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8-8

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

OL-2239-03

Chapter 8      Troubleshooting the System

Performing Amplitude Averaging

cable upstream 

n 

power-adjust 

{

threshold

 [

threshold #

] | 

continue 

[

tolerable value

] | 

noise 

[

% of 

power adjustment

]}

To disable the power-adjustment capability, use the 

no

 form of this command: 

no cable upstream power-adjust

Syntax Description

Note

The threshold default is 1 dB. The tolerable value default is 2 dB. The power adjustment is 30 percent.

Caution

Default settings are adequate for system operation. Amplitude averaging is an automatic procedure. In 
general, Cisco does not recommend that you adjust values. Cisco does recommend, however, that you 
clean up your cable plant should you encounter flapping CMs.

Note

In some instances, you might adjust certain values:

 

 

If CMs cannot complete ranging because they have reached maximum power levels, you might try to set 
the 

tolerable value 

CONTINUE field to a larger value than the default of 2 dB. Values larger than 10 dB 

on “C” versions of cable interface line cards, or 5 dB on FPGA versions, are not recommended.

 

 

If the flap list shows CMs with a large number of power adjustments, but the CMs are not detected as 
noisy, you might try to decrease the percentage for noisy. If you think that too many CMs are 
unnecessarily detected as noisy, you might try to increase the percentage.

Setting Frequency Threshold to Affect Power Adjustment

To control power adjustment methods by setting the frequency threshold, use the 

 

cable upstream freq-adj averaging in 

interface configuration mode. To disable power adjustments, use 

the 

no

 form of this command.

cable upstream 

n 

freq-adj averaging 

% of frequency adjustment

no cable upstream freq-adj averaging

Syntax

Description

n

Specifies the upstream port number.

threshold #

Specifies the power-adjustment threshold. The threshold range is from 0 to 
10 dB. The default is 1 dB.

tolerable value

Determines if the status of the RNG-RSP should be set to CONTINUE or 
SUCCESS. The range is from 2 to 15 dB. The default is 2 dB.

% of power adjustment

Specifies the percentage of power-adjustment packets required to switch 
from the regular power-adjustment method to the noise power-adjustment 
method. Range is from 10 to 100 percent. The default is 30 percent.

Содержание uBR7200 Series

Страница 1: ... San Jose CA 95134 1706 USA http www cisco com Tel 408 526 4000 800 553 NETS 6387 Fax 408 527 0883 Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide Cisco IOS Software 12 3 BC 12 2 BC 12 2CX 12 1 EC May 2009 Text Part Number OL 2239 05 ...

Страница 2: ...FormShare GigaDrive HomeLink Internet Quotient IOS iPhone iQuick Study IronPort the IronPort logo LightStream Linksys MediaTone MeetingPlace MeetingPlace Chime Sound MGX Networkers Networking Academy Network Registrar PCNow PIX PowerPanels ProConnect ScriptShare SenderBase SMARTnet Spectrum Expert StackWise The Fastest Way to Increase Your Internet Quotient TransPath WebEx and the WebEx logo are r...

Страница 3: ...Software Release 1 2 12 3 BC Release Train Images and Requirements 1 3 12 2 BC Release Train Images and Requirements 1 4 12 2 CX Images and Requirements 1 5 12 1 EC Images and Requirements 1 7 Cisco uBR7200 Series Chassis Overview 1 8 Cisco uBR7200 Series Universal Broadband Routers 1 9 Supported Hardware on the Cisco uBR7200 Series 1 11 System Interoperability 1 14 Cisco uBR7200 Series Router Con...

Страница 4: ...m Management Features 1 119 Testing Troubleshooting and Diagnostic Features 1 123 Virtual Interfaces 1 125 VLAN Features 1 126 VPN and Layer 2 Tunneling Features 1 126 WAN Optimization and Services Features 1 131 DOCSIS and CMTS Interoperability 1 137 DOCSIS NTSC Cable Plants 1 137 EuroDOCSIS Cable Plants 1 138 DOCSIS Compliant Downstream Signals 1 139 DOCSIS Compliant Upstream Signals 1 140 Traff...

Страница 5: ...figuration Settings 2 29 Reviewing Your Settings and Configurations 2 29 Viewing Sample Configuration Files 2 29 C H A P T E R 3 Configuring Cable Modem Interface Features 3 1 Configuring the Downstream Cable Modem Interface 3 2 Activating Downstream Cable Address Resolution Protocol Requests 3 2 Activating Downstream Ports 3 3 Setting the Integrated Upconverter 3 4 Assigning the Downstream Channe...

Страница 6: ...g IP Multicast Echo 3 33 Activating IP Broadcast Echo 3 34 C H A P T E R 4 Configuring DOCSIS Baseline Privacy Interface on the Cisco uBR7200 Series 4 1 Baseline Privacy Interface Overview 4 1 BPI Key Management 4 2 Differentiating Traffic Streams 4 3 CM Communication with BPI 4 3 Enabling DOCSIS BPI 4 3 DOCSIS 1 1 Baseline Privacy Interface Plus Overview 4 4 C H A P T E R 5 Managing Cable Modems ...

Страница 7: ...pts 7 3 Two way Cable Modem Scripts 7 3 Telco Return Cable Modem Scripts 7 3 Placement of Scripts 7 3 Windows NT 7 3 Solaris 7 3 Activate Scripts in Cisco Network Registrar 7 4 Configuring the Cisco uBR7200 Series to Use Scripts 7 4 Configure the System Default Policy 7 5 Cable Modems 7 5 PCs 7 5 Create Selection Tag Scopes 7 5 General 7 5 Telco Return 7 6 Create Network Scopes 7 6 Create Policies...

Страница 8: ...ble reset for Reset Messages 8 14 debug cable specmgmt for Spectrum Management 8 14 debug cable startalloc for Channel Allocations 8 14 debug cable transmit for CMTS Transmissions 8 15 debug cable ucc for Upstream Channel Change Messages 8 15 debug cable ucd for Upstream Channel Description Messages 8 15 A P P E N D I X A Installing or Upgrading Cisco IOS Software A 1 Introduction A 1 Before You B...

Страница 9: ...iversal Broadband Routers D 1 A P P E N D I X E Configuration Register Information for the Cisco uBR7200 Series Universal Broadband Routers E 1 Configuration Bit Meanings E 1 Bits 0 3 E 2 Bit 6 E 3 Bit 7 E 3 Bit 8 E 3 Bit 10 and Bit 14 E 4 Bit 11 and Bit 12 E 4 Bit 13 E 5 Bit 15 E 5 Displaying the Configuration Register While Running Cisco IOS E 5 Displaying the Configuration Register While Runnin...

Страница 10: ...Contents 10 Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide OL 2239 04 ...

Страница 11: ...ns allow cable companies Internet service providers ISPs and others to allocate channel capacity for Internet access Virtual Private Network VPN and Voice over IP VoIP services using a broadband radio frequency RF cable plant The Cisco uBR7200 series universal broadband routers sustain downstream and upstream traffic to and from two way Data Over Cable Service Interface Specification DOCSIS based ...

Страница 12: ... the Cisco uBR7200 series Table 2 summarizes the chapters and procedures in this guide Table 2 Guide Contents and Organization Title Description Chapter 1 Overview of Cisco uBR7200 Series Software Acquaints you with the supported Cisco IOS features and configuration Chapter 2 Configuring the Cable Modem Termination System for the First Time Provides instructions to make basic configurations to the...

Страница 13: ...s information on NTSC 6 MHz Phase Alternating Line PAL and Systeme Electronique Couleur Avec Memoire SECAM 8 MHz channel bands Appendix E Configuration Register Information for the Cisco uBR7200 Series Universal Broadband Routers Provides information about the functions and configuration of bits in the Cisco IOS Software Configuration Register Index Index for the entire manual Table 2 Guide Conten...

Страница 14: ...ilable on the Documentation CD ROM To fully understand the content of this guide you should be familiar with the following terms and acronyms A D analog to digital conversion ABR available bit rate AAL5 ATM adaptation layer 5 AGC automatic gain control AM VSB Amplitude Modulation Vestigial Side Band Modulation scheme ASIC Application Specific Integrated Circuit AWG American wire gauge BGP Border G...

Страница 15: ...ata terminal equipment DTR data terminal ready ESP Electronic Systems Products EMC electromagnetic compliance EMI electromagnetic interference ESD electrostatic discharge EuroDOCSIS European DOCSIS Data over Cable Service Interface Specification FCS Frame Check Sequence First Customer Shipment FDR Final Design Review FEC Forward Error Correction FRU field replaceable unit router components that do...

Страница 16: ...ion and Maintenance alarm indication signal OAM P Operations Administration Maintenance and Provisioning OC3 Optical Carrier Level 3 OIR online insertion and removal PCI Peripheral Component Interconnect PCMCIA Personal Computer Memory Card International Association PDD Project Design Document PHY Physical Layer Interface PID Packet Identifier PLL Phase Locked Loop PPP Point to Point Protocol QAM ...

Страница 17: ...cumentation The procedures in this guide assume that site preparation and hardware setup are complete Refer to the documentation page for Cisco uBR7200 Series Universal Broadband Routers for these and additional document links Note If the hypertext link to any external document does not operate you can access the desired document by typing or pasting the full document title in the Search field of ...

Страница 18: ...and Submitting a Service Request For information on obtaining documentation submitting a service request and gathering additional information see the monthly What s New in Cisco Product Documentation which also lists all new and revised Cisco technical documentation at http www cisco com en US docs general whatsnew whatsnew html Subscribe to the What s New in Cisco Product Documentation as a Reall...

Страница 19: ...supported train One early step in CMTS feature configuration is to verify your Cisco IOS release train the associated image and feature set This section guides you in determining such information Cisco uBR7200 Series Chassis Overview page 8 Describes the Cisco uBR7200 series routers and their supported hardware features and interoperability Cisco uBR7200 Series Router Configuration Overview page 1...

Страница 20: ...r7200 release notes 12_3bc 123BCu72 html Determining Your Cisco IOS Software Release To determine the version of Cisco IOS software running on the Cisco uBR7200 series universal broadband router log in to the router and enter the show version command in User or privileged EXEC mode Router show version Cisco Internetwork Operating System Software IOS tm Cisco IOS 12 2 BC Software ubr7200 is mz Vers...

Страница 21: ... Baseline Privacy p IP routing with Intermediate System to Intermediate System IS IS and Border Gateway Protocol BGP MPLS VPN support no bridging and no NAT s Plus features NAT and Inter Switch Link ISL k9 3DES level of encryption Note All images support all of the hardware listed in the Supported Hardware on the Cisco uBR7200 Series section on page 1 11 unless otherwise indicated Note A Cisco uBR...

Страница 22: ...1 uses compact Flash disk only Note Flash disks an alternative to linear Flash memory are Flash memory based devices that can be used as file storage media in the PCMCIA card slots of the I O Controllers Each I O Controller has two PCMCIA slots and can be configured with up to 256 MB of Flash disk memory Note Cisco IOS release 12 2 4 BC1and later BC releases offer certified DOCSIS 1 1 support on t...

Страница 23: ...r selected new features The latest image in the 12 2 CX release train Cisco IOS Release 12 2 15 CX1 provides two different boot images for the Cisco uBR7200 series routers ubr7200 kboot mz 122 15 CX bin The kboot version of the boot image is a new version of the boot image software that can run only on the Cisco uBR7200 NPE G1 processor and the UBR7200 I O 2FE E I O controller because it is too la...

Страница 24: ...seline Privacy p IP routing with Intermediate System to Intermediate System IS IS and Border Gateway Protocol BGP MPLS VPN support no bridging and no NAT s Plus features NAT and Inter Switch Link ISL k9 3DES level of encryption Table 1 3 Memory Recommendations for the Cisco uBR7200 Series Routers Cisco Release 12 2 15 CX1 Feature Sets Feature Set Software Image Recommended Flash Disk Memory Recomm...

Страница 25: ...P MPLS VPN support no bridging and no NAT s Plus features NAT and Inter Switch Link ISL t DOCSIS telco return Note All images support all of the hardware listed in the section Supported Hardware on the Cisco uBR7200 Series section on page 1 11 unless otherwise indicated Table 4 Memory Recommendations for the Cisco uBR7200 Series Routers Cisco Release 12 1 20 EC1 Feature Sets Feature Set Software I...

Страница 26: ...power supplies an optional clock interface that enables the router to synchronize to an external timing reference a faster processor and higher bus bandwidth Cisco uBR7246 Universal Broadband Router Supports large cable installations the chassis contains up to two single width IP backbone interfaces up to four cable TV RF interfaces and up to two power supplies Cisco uBR7223 Universal Broadband Ro...

Страница 27: ...Radio Frequency RF specification defines the RF communication paths between the CMTS and CMs or CMs in STBs The DOCSIS RF specification defines the physical link and network layer aspects of the communication interfaces It includes specifications for power level frequency modulation coding multiplexing and contention control Cisco offers products that support all DOCSIS error correction encoding a...

Страница 28: ...o uBR7246 Universal Broadband Router The Cisco uBR7246 offers an industry proven CMTS and carrier class router in a scalable platform to support data voice and video services for medium to large network installations The Cisco uBR7246 provides the following major hardware features Network processing engine I O controller Up to two network interface port adapters Up to four cable interface line car...

Страница 29: ...s The Cisco uBR7246 VXR supports the following Network Processing Engines NPEs UBR7200 NPE G1 NPE 225 NPE 300 NPE 400 The Cisco uBR7223 and the Cisco uBR7246 support the following Network Processing Engines NPE NPE 150 NPE 200 NPE 225 Note The NPE 300 and NPE 400 are not supported on the Cisco uBR7223 and the Cisco uBR7246 The NPE 150 and NPE 200 are not supported on the Cisco uBR7246 VXR Table 1 ...

Страница 30: ...t mz 12 1 10 EC must be used on this controlle r UBR7200 I O FE Features one Fast Ethernet port Equipped with an MII receptacle and an RJ 45 receptacle for use at 100 Mbps full duplex or half duplex operation Only one receptacle can be configured for use at a time Supported for Cisco uBR7223 Cisco uBR7246 and Cisco uBR7246 VXR routers The 12 0 15 SC ubr7200 boot mz 12 0 15 SC boot helper image is ...

Страница 31: ...uBR7246 VXR router Note Cisco recommends using the most current release in a release train if possible Cable Interface Line Cards The Cisco uBR7200 series supports the following cable interface line cards all of which provide connection to the hybrid fiber coaxial HFC network Table 1 6 provides a quick overview of the cable interface line cards that are supported with Cisco uBR7200 series routers ...

Страница 32: ...el EuroDOCSIS cable modems or STBs with integrated EuroDOCSIS CMs using Cisco MC16E cable interface line cards and Cisco IOS Release 12 1 2 EC1 or higher EuroDOCSIS operation support includes 8 MHz Phase Alternating Line PAL or Systeme Electronique Couleur Avec Memoire SECAM channel plans Clock Synchronization The Cisco uBR7200 series support clock hardware and software to enable high quality deli...

Страница 33: ...ontroller Slot 1 2 Cisco port adapters Slot 3 6 Cisco cable interface line cards the upstream ports on the card start with port 0 To configure the system define the Cisco uBR7200 series interfaces using the interface type slot port commands Type Cable Slot Slot number in chassis Slot numbers begin with 0 Port Port number on a cable interface line card slot Port numbers begin with a 0 Configuring C...

Страница 34: ...onfigure a spectrum group Enter the fixed center frequency for your upstream RF carrier in Hz and specify a port number from 0 to 5 Router config int cable upstream port frequency up freq hz Note Make sure that the selected upstream frequency does not interfere with the frequencies used for any other upstream applications in your cable plant Entering an upstream RF carrier frequency for each upstr...

Страница 35: ...ter or cable interface card to a different slot the logical interface number changes to reflect the new slot number Caution When hot swapping a port adapter or cable interface line card with a different type of component for example an MC11 FPGA with an MC11C or an MC16B with an MC16C you might have to reconfigure the interfaces Refer to the Cisco uBR7200 Series Universal Broadband Router Hardware...

Страница 36: ...port at two of the five DOCSIS upstream symbol rates 2 56 M and 1 28 M Refer to Table 1 7Table 1 6 for Table 1 6a list of DOCSIS supported data rates and modulation schemes The C version of the card supports the following defaults QAM 256 at 40 Mbps downstream and QAM 16 at 5 Mbps upstream The card supports upstream channel widths of 200 kHz 400 kHz 800 kHz 1 6 MHz and 3 2 MHz The card outputs 42 ...

Страница 37: ...he command to sh int c The following example illustrates the display for downstream channel port 0 in cable interface slot 3 of a Cisco uBR7246 Router sh int c 3 0 Cable3 0 is up line protocol is up Hardware is CMTS address is 0009 0ed6 ee18 bia 0009 0ed6 ee18 Internet address is 1 1 1 1 24 MTU 1500 bytes BW 27000 Kbit DLY 1000 usec rely 255 255 load 1 255 Encapsulation MCNS loopback not set keepa...

Страница 38: ...ed UBR 1 _queue_depth 0 UBR 2 _queue_depth 0 UBR 3 _queue_depth 0 POLLS_queue_depth not implemented ADMIN_queue_depth not implemented Last Minislot Stamp current_time_base 190026 FLAG 1 Last Minislot Stamp scheduler_time_base 200706 FLAG 1 Interfaces and Physical Ports Table 1 8 maps the cable interface card s interfaces and physical ports The cards can be configured in a number of different upstr...

Страница 39: ...8 Internet address is 1 1 1 1 24 MTU 1500 bytes BW 27000 Kbit DLY 1000 usec rely 255 255 load 1 255 display text omitted You can also use arguments such as the interface type Ethernet Fast Ethernet ATM serial HSSI Packet over SONET and so forth and the port address slot port to display information about a specific port adapter interface only The following example shows such a display Router sh int...

Страница 40: ...image information Table 1 9 Cisco uBR7200 Series Routers Features by Cisco IOS Release Feature Supporting Cisco IOS Releases Cisco uBR7200 Series Router Configuration Tools Autoinstall 12 0 T 12 0 XR 12 0 SC 12 1 EC 12 1 CX 12 2 BC and 12 3 BC releases Cable Interface Setup Facility 12 1 EC 12 1 CX 12 2 BC and 12 3 BC releases Cable Interface Extended Setup Facility 12 1 3a EC1 and all later Cisco...

Страница 41: ...SIS 1 0 Baseline Privacy 12 0 6 SC 12 1 EC and later releases DOCSIS 1 0 Baseline Privacy Interface Encryption and Encrypted Key Exchange 12 0 SC and later releases in multiple release trains DOCSIS 1 0 Concatenation Override Featurette 12 3 13a BC and later 12 3 BC releases DOCSIS 1 0 Extensions 12 0 16 SC3 12 1 EC 12 2 CX 12 2 BC and 12 3 BC DOCSIS 1 0 Quality of Service 12 1 EC 12 2 CX 12 2 BC ...

Страница 42: ...12 1 3a EC 12 2 15 BC2 and later releases DHCP Client ID Remote ID Options 12 0 16 SC3 and later releases in multiple release trains DHCP Time of Day ToD and TFTP Servers Multiple releases in multiple release trains beginning with 12 0 early deployment releases DOCSIS 1 1 Quality of Service Features 12 2 BC and 12 3 BC release trains with additional DOCSIS 1 1 features supported in certain earlier...

Страница 43: ...lability Features Cisco DDC Dual DOCSIS Channel 12 3 9a BC and later 12 3 BC releases DSX Messages and Synchronized PHS Information 12 3 17a BC and later 12 3 BC releases HCCP Support for the Cisco uBR MC16S Cable Interface Line Card 12 1 7 EC and later releases in multiple release trains HCCP N 1 Redundancy 12 1 10 EC with additional enhancements and support in 12 2 4 XF1 12 2 4 BC1 12 2 8 BC2 12...

Страница 44: ...tional release trains NAT Support for NetMeeting Directory Internet Locator Service ILS 12 0 XC and later releases in this and additional release trains Router Port Group Management Protocol 12 1 T and later releases in this and additional release trains Supported Protocols on the Cisco uBR7200 Series Multiple protocols are supported in all release trains that support the Cisco uBR7200 Series Mana...

Страница 45: ...Top Gateway Issue 1 2 12 3 17a BC2 and later 12 3 BC releases IGMP Version 3 12 1 3 T and later releases in multiple release trains IP Multicast Load Splitting across Equal Cost Paths 12 0 XC and later releases in this and additional release trains IP Multicast over ATM Point to Multipoint Virtual Circuits 12 0 XC and later releases in this and additional release trains IP Multicast over Token Rin...

Страница 46: ...flexive Access Lists 12 0 XC and later releases in this and additional release trains Secure Shell SSH Supported in k1 Images for Cisco uBR7200 12 1 1 T 12 2 2 XA 12 2 CX and later releases in this and additional release trains Turbo Access Control Lists 12 1 EC 12 2 CX 12 2 4 XF1 and later releases in these and additional release trains Vendor Proprietary RADIUS Attributes 11 3 11 NA 12 0 T and l...

Страница 47: ...d additional release trains Testing Troubleshooting and Diagnostic Features Cable Downstream Frequency Override 12 0 SC 12 1 EC 12 1T and 12 2BC release trains Cable Flap List 11 3 NA 12 0 4 XA 12 0 7 XR 12 1 2 EC 12 1 5 EC 12 1 7 CX 12 2 4 BC1 and later releases in these and additional release trains Cisco Broadband Troubleshooter CBT 3 2 12 3 9a BC and later 12 3 BC releases Cisco CMTS Static CP...

Страница 48: ...elay MIB Extensions 12 0 XC and later releases in this and additional release trains Frame Relay Router ForeSight 12 0 XC and later releases in this and additional release trains ISDN Advice of Charge 12 0 XC and later releases in this and additional release trains ISDN Caller ID Callback 12 0 XC and later releases in this and additional release trains ISDN Multiple Switch Types 12 0 XC and later ...

Страница 49: ...sing DHCP for Ethernet Token Ring and FDDI interfaces Before this release IP addresses for LAN interfaces were obtained using BOOTP during the AutoInstall process The AutoInstall Using DHCP for LAN Interfaces feature also allows the routing device to recognize IP address allocation messages coming from regular BOOTP servers providing a seamless transition for those devices already using BOOTP serv...

Страница 50: ...onfiguration mode For additional command information refer to the Interface Range Specification feature module on Cisco com http www cisco com en US docs ios 12_1t 12_1t4 feature guide range html Internal Modem Configuration File Editor This feature adds support for internal DOCSIS cable modem configuration file storage and generation The cable modem configuration file is generated and stored as p...

Страница 51: ...upstream using the cable upstream admission control command However this default form of load balancing affects the cable modems only when they initially register with the Cisco CMTS It does not dynamically rebalance the cable modems at later times such as when they might change upstream channels in response to RF noise problems or when bandwidth conditions change rapidly because of real time traf...

Страница 52: ...nal exec prompt timestamp Router terminal no exec prompt timestamp parser cache Command A new global configuration command no parser cache allows you to enable or disable the parser cache feature on the Cisco uBR7200 series The parser cache feature is enabled by default on all platforms using Cisco IOS Release 12 1 5 T or later The parser cache feature optimizes the parsing translation of Cisco IO...

Страница 53: ... modulation profile The show cable burst profile command has been removed Its functions have been incorporated into the show cable modulation profile command which includes an added option number that displays the modulation profile number show cable modem summary Commencing with Cisco IOS Release 12 1 6 EC the show cable modem summary command is enhanced with the following options to display per ...

Страница 54: ...vice MIB to the cable logging buffer instead of to the general logging buffer use the cable logging layer2events command in global configuration mode To disable the logging of DOCSIS events to the cable logging buffer use the no form of this command cable logging layer2events no cable logging layer2events Syntax Description This command has no additional arguments or keywords Defaults DOCSIS event...

Страница 55: ...reference cbl_book html cable source verify To enable verification of IP addresses or service IDs SIDs for CMs and CPE devices on the upstream use the cable source verify command in global configuration cable interface configuration or subinterface configuration modes To disable verification use the no form of this command Cable Interface and Subinterface Configuration Modes cable source verify dh...

Страница 56: ...ses whose lease times have expired The valid range for value is 1 to 240 minutes with a default of 60 minutes Note The leasetimer option takes effect only when the dhcp option is also used on an interface Also this option is supported only on the master interface and cannot be configured on subinterfaces Configuring it for a master interface automatically applies it to all subinterfaces leasequery...

Страница 57: ...group cm cpe learnable max cpe no cable submgmt default Syntax Description 12 2 15 BC2 Support for verifying CMs and CPE devices that are on a different subnet than the cable interface was enhanced to use Reverse Path Forwarding RFP 12 3 9a BC In order to protect the Cisco CMTS from denial of service attacks Cisco IOS Release 12 3 9a BC adds the option of using a per SID basis for deriving lease q...

Страница 58: ...ote The second CPE device changes from dhcp cpe to static CPE in the CMTS host tables Examples The following example enables Cisco CMTS Static CPE Override in the field enabling more or more additional CPE devices to be added behind a subscriber s cable modem Router config cable submgmt default active The following example configures the Cisco CMTS to accept a temporary CPE device which inherits a...

Страница 59: ...upport Syntax Description This command has no additional arguments or keywords Defaults This command has no default behavior or values Command Modes Privileged EXEC Command History Examples The following example illustrates the cable modem and interface information from a Cisco uBR7246VXR router on which Cisco IOS Release 12 3 9a BC is installed Router show cable tech support Command Description s...

Страница 60: ...isco uBR7100 series router the only valid value is 1 0 On the Cisco uBR7200 series router slot can range from 3 to 6 and port can be 0 or 1 depending on the cable interface slot port Identifies the cable interface on the Cisco uBR7246VXR router Th syntax for the Cisco uBR10012 router is slot subslot port where the following are the valid values slot 5 to 8 subslot 0 or 1 port 0 to 4 depending on t...

Страница 61: ... the show controllers cable downstream command CMTS01 show controllers cable 3 0 downstream Cable 3 0 Downstream is up Frequency not set Channel Width 6 MHz 64 QAM Symbol Rate 5 056941 Msps FEC ITU T J 83 Annex A R S Interleave I 12 J 17 Release Modification 11 3 NA This command was introduced 12 0 2 XC This command was modified to show a number of additional fields 12 1 5 EC1 Support was added fo...

Страница 62: ...t the Cisco CMTS router when reporting a problem to Cisco technical support use the show tech support command in privileged EXEC mode show tech support page password cef ipc ipmulticast isis mpls ospf rsvp Note The show tech support command automatically displays the output of a number of different show commands The exact output depends on the platform configuration and type of protocols being use...

Страница 63: ...ptional Causes the output to display a page of information at a time Use the Return key to display the next line of output or use the space bar to display the next page of information If not used the output scrolls that is does not stop for page breaks password Optional Leaves passwords and other security information in the output If not used passwords and other security sensitive information in t...

Страница 64: ...ature can also be used to detect and respond to denial of service and other types of network attacks Cisco IOS NBAR uses a protocol description language module PDLM to define the rules by which the NBAR processes recognize an application New PDLM definitions can usually be loaded without the need for a Cisco IOS software upgrade or a router reboot allowing for a rapid response to discovered attack...

Страница 65: ...sequery Server page 1 47 DHCP MAC Address Exclusion List for cable source verify dhcp Command page 1 48 See the DOCSIS 1 1 Feature Support section on page 1 57 for additional DHCP features Configurable Leasequery Server Previously lease query requests could only be sent to the DHCP server Beginning with Cisco IOS Release 12 3 17a BC an alternate server may be configured to receive the requests The...

Страница 66: ...eds this exclusionary check then the source IP address is verified against Address Resolution Protocol ARP tables as per normal and previously supported source verification checks The service ID SID and the source IP address of the packet must match those in the ARP host database on the Cisco CMTS If the packet check succeeds the packet is allowed to pass Rejected packets are discarded in either o...

Страница 67: ...es only it is authorized to access To enable BPI choose software at both the CMTS and cable modem that support the mode of operation For the Cisco uBR7200 series software choose an image with k1 in its file name or BPI in the feature set description The cable modem must also support BPI CMs must have factory installed RSA private public key pairs to support internal algorithms to generate key pair...

Страница 68: ...r multiple packets and to send all packets in a single large burst on the upstream Concatenation was introduced in the upstream receive driver in the previous Cisco IOS releases that supported DOCSIS 1 0 Per SID counters were later added in Cisco IOS release 12 1 4 CX for debugging concatenation activity In some circumstances overriding concatenation on DOCSIS 1 0 cable modems may be preferable an...

Страница 69: ...ta traffic that goes to the same ITCM to address rate shaping purposes Concatenation To increase the per cable modem upstream throughput in certain releases of software Cisco uBR7200 series software supports a concatenated burst of multiple MAC frames from a cable modem that supports concatenation Note All DOCSIS 1 0 extensions are activated only when a cable modem or Cisco uBR924 that supports th...

Страница 70: ...w controller command displays whether concatenation is enabled on an interface Note Concatenation is supported only with cable modems that support DOCSIS concatenation Embedded Client Signaling dynamic SIDs Supports the dynamic creation configuration and deletion of Service Identifiers SIDs to accommodate different classes of service This allows cable modems to request high priority or high bandwi...

Страница 71: ...ency Specification SP RFI IOS 991105 The DOCSIS Customer Premises Equipment CPE Configurator V2 0 4 provides you with a Web based graphical user interface GUI that allows you to collect information needed to generate and download configuration files for DOCSIS or EuroDOCSIS CMs and STBs There are two versions of the Cisco DOCSIS CPE Configurator V2 0 4 Cisco Connection Online CCO version HTML base...

Страница 72: ...that register to the corresponding QoS profile Note QoS definitions must previously exist on the Cisco CMTS headend to support this feature ERBA for DOCSIS 1 0 cable modems is supported with these new or enhanced commands or keywords in Cisco IOS release 12 3 13a BC cable qos pro max ds burst burst size show cable qos profile n verbose To define ERBA on the downstream for DOCSIS 1 0 cable modems u...

Страница 73: ...solicited Grant Interval usecs 0 Upstream Maximum Transmit Burst bytes 1522 Downstreamam Maximum Transmit Burst bytes 100000 IP Type of Service Overwrite Mask 0x1 IP Type of Service Overwrite Value 0xA0 Downstream Maximum Rate bps 90000 Created By mgmt Baseline Privacy Enabled no Usage Guidelines If a cable modem registers with a QoS profile that matches one of the existing QoS profiles on the Cis...

Страница 74: ...on about the cable qos profile command and configuring QoS profiles refer to the following documents on Cisco com Cisco IOS CMTS Cable Command Reference Guide http www cisco com en US docs ios cable command reference cbl_book html DOCSIS 1 1 for the Cisco CMTS http www cisco com en US docs cable cmts feature guide ufg_docs html DOCSIS 1 0 Feature Support In response to the limitations of DOCSIS 1 ...

Страница 75: ...oice and data traffic This allows the CMTS and cable modem to give higher priority for voice traffic preventing the data traffic from affecting the quality of the voice calls Separate Downstream Rates This feature provides an ability to provide separate downstream rates for any given cable modem based on the IP precedence value in the packet This helps separate voice signaling and data traffic tha...

Страница 76: ...ed in Configuring DOCSIS Baseline Privacy Interface on the Cisco uBR7200 Series available on Cisco com http www cisco com en US docs cable cmts ubr7200 configuration guide u72_bpi html Burst Profile Configuration For each modulation burst profile configuration Cisco uBR7200 series universal broadband routers support burst profile number burst profile interval usage code burst type preamble length ...

Страница 77: ...he number of CPEs that can use the cable modem to access the cable network Note This feature is separate from the cable modem s ability to support multiple CPE devices For example depending on the Cisco IOS software release being used Cisco uBR900 series cable access routers can support a maximum of either 3 or 254 CPE devices Also by default a DOCSIS based cable modem supports one CPE device but ...

Страница 78: ...P server hosts allocate network addresses and deliver configuration parameters to dynamically configured hosts DHCP supports three mechanisms for IP address allocation Automatic allocation DHCP assigns a permanent IP address to a client Dynamic allocation DHCP assigns an IP address to a client for a limited period of time or until the client explicitly relinquishes the address Manual allocation Th...

Страница 79: ...able modem allowing a single cable modem to support a combination of data voice and video traffic Greater granularity in QoS per cable modem in either direction using unidirectional service flows Dynamic MAC messages that can create modify and tear down QoS service flows dynamically when requested by a DOCSIS 1 1 cable modem Downstream QoS Handling Supported Downstream QoS handling is compliant wi...

Страница 80: ...as been changed to indicate that the SID shown is the primary SID for each cable modem The show interface cable command has been updated to include the secondary SIDs for each cable modem For additional information refer to Multiple Service ID Support for the Cisco uBR7200 Series Cable Router on Cisco com http www cisco com en US docs ios 12_0t 12_0t5 feature guide multisid html Payload Header Sup...

Страница 81: ...et from Greenwich Mean Time GMT Time Server Option option 4 Specifies one or more IP addresses for a ToD server During initial provisioning a DOCSIS cable modem or CPE device attempts to contact the ToD server If successful the cable device updates its onboard clock with the time offset and timestamp received from the ToD server If a ToD server cannot be reached or if it does not respond the cable...

Страница 82: ...ly assigns the same IP address to a PC the Cisco uBR7200 series CMTS reports this Using customer databases administrators can cross reference the spoofing cable modem and PC to prevent further usage The cable source verify dhcp command for cable interfaces specifies that DHCP lease query requests are sent to verify any unknown source IP address found in upstream data packets Upstream Address Verif...

Страница 83: ... of protocols and combinations of Ethernet Fast Ethernet Gigabit Ethernet serial High Speed Serial Interface HSSI Packet over SONET POS OC 3 and OC 12c and Asynchronous Transfer Mode ATM media Downstream Channel ID This feature allows all cable modems in an HFC network to identify themselves via unique downstream channel IDs instead of their downstream frequencies To configure the downstream chann...

Страница 84: ...capsulates the packets using generic routing encapsulation GRE Thus intermediate routers between tunnel endpoints can also take advantage of QoS features such as weighted fair queuing WFQ and weighted random early detection WRED For additional information refer to the following document on Cisco com Downstream Rate Shaping with TOS Bits for the Cisco uBR7200 Series Cable Router http www cisco com ...

Страница 85: ...tions The DOCSIS 2 0 A TDMA Support feature incorporates the following advantages and improvements of DOCSIS 2 0 networks Builds on existing DOCSIS cable networks by providing full compatibility with existing DOCSIS 1 0 and DOCSIS 1 1 cable modems The registration response REG RSP message contains the DOCSIS version number to identify each cable modem s capabilities Upstreams can be configured for...

Страница 86: ... 69 DSX Messages and Synchronized PHS Information page 1 69 Globally Configured HCCP 4 1 Redundancy on the Cisco uBR7246VXR Router page 1 69 HCCP Support for the Cisco uBR MC16S Cable Interface Line Card page 1 70 HCCP N 1 Redundancy page 1 70 High Availability Features in Cisco IOS Release 12 3 13a BC page 1 71 High Availability Support for Encrypted IP Multicast page 1 71 Hot Standby 1 1 Redunda...

Страница 87: ...ported during a switchover event of these types Route Processor Redundancy Plus RPR with Active and Standby Performance Routing Engines PREs HCCP N 1 Redundancy with Working and Protect cable interface line cards For additional information about these enhancements and related High Availability features refer to the following documents on Cisco com N 1 Redundancy for the Cisco Cable Modem Terminati...

Страница 88: ...the Cisco uBR10012 and or the Cisco uBR7246VXR routers the Cisco RF Switch provides a fully redundant system that enables cable operators to achieve PacketCable system availability minimize service disruptions and simplify operations HCCP N 1 Redundancy is an important step toward high availability on CMTS and telecommunications networks that use broadband media HCCP N 1 Redundancy can help limit ...

Страница 89: ... during switchover events in a High Availability environment This feature is supported for Route Processor Redundancy Plus RPR N 1 Redundancy and encrypted BPI streams For additional information about IP Multicast and High Availability refer to these documents on Cisco com Cisco CMTS Universal Broadband Router MIB Specifications Guide http www cisco com en US docs cable cmts mib reference guide ub...

Страница 90: ...http www cisco com en US docs cable cmts feature HCCPfeat html IF Muting for HCCP N 1 Redundancy Beginning with Cisco IOS Release 12 2 15 BC2a Cisco supports IF Muting with both SNMP and non SNMP capable upconverters in HCCP N 1 Redundancy IF Muting offers the following benefits IF Muting for either type of upconverter significantly increases the N 1 protection schemes that are available for Cisco...

Страница 91: ... PacketCable Multimedia on the Cisco CMTS http www cisco com en US docs cable cmts feature guide ufg_pkcb html Cisco PacketCable Primer White Paper http www cisco com en US netsol ns341 ns121 ns342 ns343 networking_solutions_white_paper 09186a0080179138 shtml Cable Monitor Enhancements Cisco IOS Release 12 3 17a BC introduces the following enhancements to the cable monitor feature Access Control L...

Страница 92: ... allows you to change the DSCP marking for COPS messages that are transmitted or received by the Cisco router Differentiated Services Code Point DSCP values are used in Quality of Service QoS configurations on a Cisco router DSCP summarizes the relationship between DSCP and IP precedence Cisco IOS Release 12 3 13a BC supports this function with the cops ip dscp command in global configuration mode...

Страница 93: ...command affects all TCP connections with all COPS servers This command does not affect existing connections to COPS servers Once you issue this command this function is supported only for new connections after that point in time x This value specifies the markings with which COPS messages are transmitted The following values are supported 0 63 DSCP value ranging from 0 63 af11 Use AF11 dscp 001010...

Страница 94: ...e CS3 dscp 011000 precedence 3 cs4 Use CS4 dscp 100000 precedence 4 cs5 Use CS5 dscp 101000 precedence 5 cs6 Use CS6 dscp 110000 precedence 6 cs7 Use CS7 dscp 111000 precedence 7 default Use default dscp 000000 ef Use EF dscp 101110 Additional COPS Information Cisco 12 3 13a BC also supports Access Control Lists ACLs for use with COPS Refer to the Access Control List Support for COPS Intercept sec...

Страница 95: ... time Examples The following example configures the TCP window size to be 64000 bytes Router config cops tcp window size 64000 The following example illustrates online help for this command Router config cops tcp window size 516 65535 Size in bytes Additional COPS Information Cisco 12 3 13a BC also supports Access Control Lists ACLs for use with COPS Refer to the Access Control List Support for CO...

Страница 96: ...unctions as intercept requests are initiated a mediation device MD using SNMPv3 Note No new CLI commands are provided for this feature in Cisco IOS release 12 3 13a BC Cisco IOS Release 12 3 13a BC enables full Multiple Service Operator MSO compliance with SII and LI regulations Service providers worldwide are legally required to allow government agencies to conduct surveillance on the service pro...

Страница 97: ...ic mapping to a multicast group The Multicast downstream QoS feature uses the existing infrastructure DOCSIS 1 1 service flow to assign a multicast service identifier SID to a multicast group used in the Baseline Privacy Interface BPI encryption feature When disabled the Multicast downstream QoS feature does not impact any other features The multicast packets to downstream cable interfaces are sen...

Страница 98: ...e 1 81 Cable Interface Bundling and Cable Subinterfaces page 1 82 Configurable Alternate Termination System Information Messages page 1 83 Easy IP Phase 1 page 1 83 Fast Switched Policy Routing page 1 83 IP Enhanced IGRP Route Authentication page 1 84 IP Network Address Translation Port Address Translation page 1 84 NAT Support for NetMeeting Directory Internet Locator Service ILS page 1 84 Router...

Страница 99: ...col UDP port To deactivate this function use the no form of this command cable intercept mac address ip address udp port no cable intercept mac address reply accept number window size Configures the cable interface to accept only the specified number of ARP reply packets every window size seconds for each active Service ID SID on that interface The cable interface drops ARP reply packets for a SID...

Страница 100: ...also configure multiple bundle interfaces Use the following commands to configure and view cable interface bundles no cable bundle n master show cable bundle Up to four interface bundles can be configured In each bundle specify exactly one interface as the master interface using the master keyword In the case of a subinterface over a cable bundle x is the interface number of the bundle master 1 Th...

Страница 101: ...ntrol Protocol IPCP This feature enables a Cisco router to negotiate automatically its own registered WAN interface IP address from a central server and to enable all remote hosts to access the Internet using this single registered IP address The ability of multiple LAN devices to use the same globally unique IP address is known as overloading Because Easy IP Phase 1 uses existing port level multi...

Страница 102: ...to globally registered IP addresses Cisco IOS NAT also increases network privacy by hiding internal IP addresses from external networks You can configure several internal addresses with NAT to only one or a few external addresses by using a feature called Port Address Translation PAT which is also referred to as overload a subset of NAT functionality PAT uses unique source port numbers on the Insi...

Страница 103: ...Cisco uBR7200 Series supports multiple protocols of multiple classes including but not limited to the following Address Resolution Protocol ARP Cisco Discovery Protocol CDP Domain Name System DNS Internet Protocol IP v4 v5 Simple Network Management Protocol SNMP v2 and SNMPv3 Integrated Dynamic Host Configuration Protocol DHCP server Trivial File Transfer Protocol TFTP client User Datagram Protoco...

Страница 104: ...able Modem Termination System CMTS is a multifaceted feature that implements a Quality of Service QoS policy on the CMTS Headend Admission Control establishes efficient resource and bandwidth utilization in a way that was not possible in prior Cisco IOS releases Admission Control monitors multiple system level resources on the Cisco CMTS and performs automatic resource allocation on a service requ...

Страница 105: ...t having to send the traffic through the Cisco uBR7200 series router For additional information about these and other CMTS commands refer to the Cisco IOS CMTS Cable Command Reference Guide on Cisco com cable map advance Command Enhancements Cisco IOS Release 12 1 10 EC updates the cable map advance command with a new option max delay The new command syntax is the following cable map advance dynam...

Страница 106: ...d with the ip http server command Use the international command in line configuration mode to display 8 bit and multibyte international character sets and print the ESC character as a single character instead of when using Telnet to access a Cisco IOS platform Use the terminal international command in privileged EXEC mode to display 8 bit and multibyte international character sets and print the ES...

Страница 107: ...cisco com en US docs ios cable command reference cbl_book html Dynamic Channel Change DCC for Loadbalancing Cisco IOS Release 12 3 17a BC introduces Dynamic Channel Change DCC and DCC for Load Balancing on the Cisco CMTS DCC in DOCSIS 1 1 dynamically changes cable modem upstream or downstream channels without forcing a cable modem to go offline and without re registration after the change DCC supp...

Страница 108: ...esetting has been introduced into the modem state list A modem is deprovisioned when moving into this state as if going offline Move the modem to the Continue Ranging list If a ranging request is received from the modem send a Ranging Abort message Continue until an Initial Ranging message is received or until normal timeout 16 attempts If the modem does not go back to initial ranging set it to of...

Страница 109: ... equally distribute the cable modems to different upstreams when the cable modems register You can refine this form of load balancing by imposing a limit on the number of cable modems that can register on any particular upstream using the cable upstream admission control command However this default form of load balancing affects the cable modems only when they initially register with the Cisco CM...

Страница 110: ...nterface or for a particular cable modem For additional command information refer to these documents on Cisco com Cisco IOS CMTS Cable Command Reference Guide http www cisco com en US docs ios cable command reference cbl_book html Maximum CPE or Host Parameters for the Cisco Cable Modem Termination System chapter in the Cisco Cable Modem Termination System Feature Guide http www cisco com en US do...

Страница 111: ...qualization To remove this exclusion use the no cable pre equa exclude modem oui form cable pre equalization exclude To exclude a cable modem from pre equalization during registration with the Cisco CMTS use the cable pre equalization exclude command in global configuration mode Exclusion is supported for a specified cable modem or for a specified OUI value for the entire interface To remove exclu...

Страница 112: ... one per line End with CNTL Z Router config cable pre equalization exclude oui 00 09 04 Router config end Router show run Router show running config inc oui cable pre equalization exclude oui 00 09 04 Router On the line card console for the same Cisco uBR7246VXR router verify the configuration with the following command clc_7_1 show running config inc oui cable pre equalization exclude oui 00 09 0...

Страница 113: ...For additional information about this feature refer to the following documents on Cisco com DOCSIS 1 1 for the Cisco CMTS http www cisco com en US docs cable cmts feature guide ufg_docs html Cisco Broadband Cable Command Reference Guide http www cisco com en US docs ios cable command reference cbl_book html Subscriber Traffic Management STM Version 1 1 Cisco IOS Release 12 3 9a BC introduces suppo...

Страница 114: ...ge 1 99 IP Multicast Load Splitting across Equal Cost Paths page 1 99 IP Multicast over ATM Point to Multipoint Virtual Circuits page 1 100 IP Multicast over Token Ring LANs page 1 100 Source Specific Multicast page 1 101 Stub IP Multicast Routing page 1 101 Bidirectional PIM Cisco IOS Releases Supported in the Cisco IOS 12 2 BC and 12 1 EC release trains Bidirectional Protocol Independent Multica...

Страница 115: ...troduces support for DOCSIS Set Top Gateway DSG Issue 1 1 on the Cisco uBR10012 router DOCSIS Set Top Gateway DSG 1 1 introduces Advanced mode DSG functionality based on Cablelabs specification CM SP DSG I03 041124 on the Cisco uBR7246VXR and uBR10012 platforms DSG 1 1 introduces support for several DOCSIS 1 1 networks and their multiple service operators MSOs Supports advanced mode capabilities s...

Страница 116: ...ssues and A DSG 1 1 is that advanced mode uses DCD messages to manage the DSG tunnels The DCD message contains a group of DSG Rules and DSG Classifiers including the following DSG rules and rule priority DSG classifiers DSG channel list type length value TLV DSG client identifier whether broadcast CA System application or MAC level DSG timer list DSG upstream channel ID UCID list Vendor specific i...

Страница 117: ... Advanced mode DOCSIS Set Top Gateway 1 2 for the Cisco CMTS http www cisco com en US products hw cable ps2217 products_feature_guides_list html IGMP Version 3 Internet Group Management Protocol IGMP is a protocol used by IPv4 systems to report IP multicast group memberships to neighboring multicast routers On networks with hosts directly attached IGMP Version 3 IGMPv3 adds support for source filt...

Страница 118: ...ed and sent multiple times over the ATM interface For configuration information refer to the following document on Cisco com Configuring IP Multicast Routing chapter in theCisco IOS IP Configuration Guide Release 12 2 guide on Cisco com http www cisco com en US docs ios 12_2 ip configuration guide fipr_c html IP Multicast over Token Ring LANs By default IP multicast datagrams on Token Ring LAN seg...

Страница 119: ...IGMPv3 Stub IP Multicast Routing When you use PIM in a large network there are often stub regions over which the administrator has limited control To reduce the configuration and administration burden you can configure a subset of PIM functionality that provides the stub region with connectivity but does not allow it to participate in or potentially complicate any routing decisions Stub IP multica...

Страница 120: ... call signaling provisioning quality of service QoS security billing and network management Cisco IOS Release 12 2 11 BC1 and later releases in the Cisco IOS 12 3 release train support the PacketCable 1 0 specifications and the CALEA intercept capabilities of the PacketCable 1 1 specifications For additional information about configuring PacketCable on the Cisco CMTS refer to the following documen...

Страница 121: ...thentication feature a second level of user authentication is achieved when the user accesses the network access server or router through Telnet and enters a user name and password Now with automated double authentication the user does not have to Telnet anywhere but instead responds to a dialog box that requests a user name and password or PIN For information about the existing double authenticat...

Страница 122: ...estment without the cost and learning curve associated with a new platform VPN support deploying Cisco IOS Firewall with Cisco IOS encryption and QoS VPN features enables extremely secure low cost transmissions over public networks and ensures mission critical application traffic receives high priority delivery Scalable deployment available for a wide variety of router platforms the Cisco IOS Fire...

Страница 123: ...ess for the real mobile host To avoid this security hole the Dynamic Mobile Hosts feature pings the mobile host on the old service identifier SID to verify that the host has indeed been moved A DHCP server is used to verify addresses and can be configured with the cable source verify dhcp command the no cable arp command should be configured in the CMTS to prevent it from sending ARP requests For ...

Страница 124: ...et exclude command allow specific cable modems to be excluded from the Dynamic Shared Secret feature on the following Cisco CMTS platforms Cisco uBR7246VXR universal broadband router Cisco uBR10012 universal broadband router The Dynamic Shared Secret feature automatically creates a unique DOCSIS shared secret on a per modem basis creating a one time use DOCSIS configuration file that is valid only...

Страница 125: ...al access interface each time any user dials in This is described in the following document on Cisco com Virtual Templates Profiles and Networks chapter in the Cisco IOS Dial Technologies Configuration Guide Release 12 2 http www cisco com en US docs ios 12_2 dial configuration guide fdial_c html AAA per user security and interface configuration information stored on a separate AAA server and sent...

Страница 126: ... images for Cisco uBR924 cable access routers was changed from support for BPI only to also include support for Secure Shell SSH This change caused an inconsistency with Cisco uBR7200 series images since the definition of k1 for the Cisco uBR7200 was not changed and did not include SSH Cisco uBR7200 series universal broadband routers support the Cisco IOS Firewall feature This feature set offers N...

Страница 127: ...on Guide Release 12 2 on Cisco com http www cisco com en US docs ios 12_2 security configuration guide fsecur_c html SNMP Features and Enhancements Multiple Cisco IOS releases that support the Cisco uBR7200 Series include enhanced Simple Network Management Protocol SNMP features Individual SNMP Trap Support page 1 109 LinkUp Down Traps Support RFC 2233 page 1 110 SNMPv2C page 1 110 SNMPv3 page 1 1...

Страница 128: ...ndard are defined in IF MIB Since IF MIB supports subinterfaces all objects in this varbind list are also supported for subinterfaces The feature allows you to base the Link Up Down trap varbind list on a Cisco specific or IETF standard with a new CLI configuration command To enable linkUp linkDown Simple Network Management Protocol SNMP traps which are compliant with RFC2233 use the snmp server t...

Страница 129: ...Remote Modem Monitoring To specify how often SNMP polls the modem and to configure access use the cable modem remote query command in global configuration mode To disable the gathering of cable modem statistics use the no form of this command cable modem remote query polling interval community string no cable modem remote query Syntax Description Verifying Remote Query Information To display infor...

Страница 130: ...nterprise MIBs see the Cisco MIB web page on Cisco com SNMP and Cable Specific MIBs Table 1 14 shows the SNMP and cable specific MIBs that are supported on the Cisco uBR7200 series universal broadband routers The table provides a brief description of each MIB s contents and the Cisco IOS software release in which the MIB was initially functional earlier releases might have had unsupported prototyp...

Страница 131: ...s used in Cisco s enterprise MIBs 12 0 6 SC 12 1 2 EC 12 2 4 XF1 12 2 BC IF MIB my IF MIB V1SMI my This module describes generic objects for the Layer 3 network interface sublayers This MIB is an updated version of MIB II s if table and incorporates the extensions defined in RFC 2233 12 1 2 EC 12 2 4 XF1 12 2 BC DOCS IF MIB my DOCS IF MIB V1SMI my This module describes the DOCSIS compliant Radio F...

Страница 132: ... ftp ftp cisco com pub mibs v2 CISCO CIRCUIT INTERFACE MIB my cdxCmtsCmOnOffTrapEnable SNMP Object The following new CLI commands are supported for the cdxCmtsCmOnOffTrapEnable object no cable enable trap cmonoff notification no cable enable trap cmonoff interval time 0 to 86400 These commands have the following default settings no cable enable trap cmonoff notification no cable enable trap cmonof...

Страница 133: ... Expression MIB to use Delta values of an object instead of absolute values when evaluating an expression Delta is obtained by taking the difference between the current value of an object and its previous value The Wildcarding function of the Expression MIB allows evaluation of multiple instances of an object This is useful in cases where an expression needs to be applied to all instances of an ob...

Страница 134: ...riables from the NTP subsystem and returning them in the response The NTP MIB defines a set of NTP server system objects including an NTP server peers table and an NTP server filter register table For complete details on the Cisco implementation of the NTP MIB refer to the MIB file itself at ftp ftp cisco com pub mibs v2 CISCO NTP MIB my SNMP Enhancements to CISCO DOCS EXT MIB Commencing with Cisc...

Страница 135: ...CO CABLE QOS MONITOR MIB Cisco IOS Release 12 3 9a BC introduces additional features for the CISCO CABLE QOS MONITOR MIB including the following Clarified the descriptions of a number of objects Added a number of objects in the ccqmCmtsEnforceRuleTable to support DOCSIS 1 1 and DOCSIS 2 0 cable modems and to support peak and off peak monitoring Added the ccqmCmtsIfBwUtilTable to provide thresholds...

Страница 136: ...tMaxSize Reflects the flap list size as configured by the cable flap list size command ccsFlapListCurrentSize Reflects the current size of the flap list for each MAC domain downstream CISCO PROCESS MIB The CISCO PROCESS MIB enables you to monitor CPU and memory utilization for RF cards cable interface line cards and broadband processing engines on the Cisco CMTS This information is collected via S...

Страница 137: ...ted and appears to the SNMP server as a Cold Start trap This functionality is already supported in all Cisco IOS 12 1 EC releases Spectrum Management and Advanced Spectrum Management Features Spectrum management features including dynamic upstream modulation were introduced in Cisco IOS Release 12 2 4 XF1 and these continue in the Cisco 12 2 BC release train These and other features relating to sp...

Страница 138: ...hopping the Cisco uBR MC16S can dynamically vary upstream channel widths By entering an optional second channel width value per upstream port you can instruct the Cisco uBR MC16S to hierarchically search for clean upstream channels of 3 2 MHz 1 6 MHz 800 kHz 400 kHz and 200 kHz width For additional information about spectrum management features and their configuration refer to the chapter titled S...

Страница 139: ...isco IOS provides one preconfigured modulation profile resident in memory which defines a typical profile for QPSK modulation In order to use the Dynamic Upstream Modulation feature a second profile must be created that is unique from the first profile and typically provides a higher modulation scheme The upstream port must be assigned this second modulation profile Use the cable upstream modulati...

Страница 140: ...eats Supports Subscriber Traffic Management STM Version 1 1 page 1 95 with caveats For additional information about CBT 3 2 spectrum management and STM 1 1 refer to the following documents on Cisco com Release Notes for Cisco Broadband Troubleshooter Release 3 2 http www cisco com en US products sw netmgtsw ps530 prod_release_note_chapter09186a0080 293344 html Spectrum Management for the Cisco CMT...

Страница 141: ...em Termination System CMTS universal broadband routers for troubleshooting cable modem connectivity problems The flap list tracks flapping cable modems cable modems that have intermittent connectivity problems that could indicate a problem with the cable modem or with the upstream or downstream portion of the cable plant The flap list feature does not require any special polling or data transmissi...

Страница 142: ... CMTS http www cisco com en US docs cable cmts feature guide ufg_spec html Subscriber Traffic Management for the Cisco CMTS https www cisco com en US docs cable cmts feature ubsubmon html Cisco CMTS Static CPE Override The cable submgmt default command enables Multiple Service Operators MSOs to override network DHCP settings on CPE devices when performing troubleshooting with a laptop computer and...

Страница 143: ...ster and slave interfaces and introduces these additional changes Virtual interface bundling uses bundle interface and bundle members instead of master and slave interfaces The virtual bundle interface is virtually defined as with IP loopback addresses for example Virtual interface bundling supports bundle information in multiple show ip interface commands Virtual interface bundling prevents loss ...

Страница 144: ...e virtually as many logical networks as are necessary for your environment For configuration information for Hot Standby Router Protocol HSRP over Inter Switch Link ISL protocol refer to these documents on Cisco com Configuring Routing Between VLANs with Inter Switch Link Encapsulation chapter in the Cisco IOS Switching Services Configuration Guide Release 12 2 http www cisco com en US docs ios 12...

Страница 145: ...ch as policy routing Committed Access Rate WFQ and WRED can operate on intermediate routers between GRE tunnel endpoints Additional security is possible when Cisco IOS network layer encryption is used with precedence for GRE tunnels to provide data confidentiality between VPN tunnel endpoints QoS policy granularity is available per network per user and per application The deployment of a GRE tunne...

Страница 146: ...es In summary the service provider creates a DOCSIS configuration file for each cable modem that contains Multiple secondary upstream service flows that specify QoS profiles for each CPE device A Vendor Specific QoS Parameter that identifies the MPLS VPN route to be used for packets using a particular service flow Multiple secondary upstream packet classifiers that specify the MAC address for each...

Страница 147: ...ices Configuration Guide Release 12 2 on Cisco com Overlapping Subinterface IP Addresses Multiprotocol Label Switching MPLS based Virtual Private Networks VPNs are created in Layer 3 and provide privacy and security by constraining the distribution of a VPN s routes to those routers that are members of the VPN only and by using MPLS forwarding Each ISP s VPN is insulated from all others sharing th...

Страница 148: ... Virtual Private Networks Cisco IOS Release 12 3 13a BC introduces the following changes or requirements for the TLS feature with Layer 2 VPNs When the TLS feature is used with Layer 2 VPNs the participating cable modems must have the Baseline Privacy Interface security feature BPI enabled Otherwise the Cisco CMTS drops such Layer 2 traffic in the upstream or downstream Information about Customer ...

Страница 149: ... ability to govern link utilization Once peers have successfully negotiated BACP they can use the Bandwidth Allocation Protocol BAP which is a subset of BACP to negotiate bandwidth allocation BAP provides a set of rules governing dynamic bandwidth allocation through call control a defined method for adding and removing links from a multilink bundle for Multilink PPP is used BACP provides the follo...

Страница 150: ...o com Frame Relay Enhancements Cisco IOS Releases Cisco IOS Release 12 2 4 BC1 and the Cisco uBR7200 series support recent frame relay enhancements such as Frame Relay end to end keepalives PPP configuration over Frame Relay For additional information about configuring frame relay refer to one of these two documents on Cisco com depending on your Cisco IOS release Configuring Frame Relay in the Ci...

Страница 151: ... call costs and to control and possibly reduce tariff charges The short hold mode idle time will do the following Disconnect a call just prior to the beginning of a new charging period if the call has been idle for at least the configured minimum idle time Maintain the call to the end of the current charging period past the configured idle timeout if the time left in the charging period is longer ...

Страница 152: ...m MPPC was ratified by the Internet Engineering Task Force IETF and is known as RFC 2118 The Windows 95 client software supports both MPPC and LZS Stacker compression whereas the Microsoft NT server and Windows 2000 only support MPPC which is negotiated during the Compression Control Protocol CCP process To enable MPPC compression on access servers you need to be running Cisco IOS Software version...

Страница 153: ...AD Facility for X 25 Connections in the Cisco IOS Terminal Services Configuration Guide Release 12 2 on Cisco com PPPoE Termination Support on Cable Interfaces Cisco IOS Release 12 2 4 BC1 adds support for Point to Point Protocol over Ethernet PPPoE by allowing a direct connection to cable interfaces PPPoE provides service provider digital subscriber line DSL support The support of PPPoE on cable ...

Страница 154: ...lowing command at the prompt Router b flash X 25 Switching Between PVCs and SVCs To configure PVC to SVC switching between two serial interfaces both interfaces must already be configured for X 25 In addition X 25 switching must be enabled using the x25 routing global configuration command The PVC interface must be a serial interface configured with X 25 encapsulation The SVC interface may use X 2...

Страница 155: ...S compliant cable plants that support North American channel plans use ITU J 83 Annex B RF Figure 1 1 illustrates a DOCSIS two way and telco return architecture Figure 1 1 DOCSIS Two Way and Telco Return Architecture PSTN Telco return access Distribution hub or headend Operation support system Cable modem termination system CMTS Mod Demod Downstream RF interface Upstream RF interface Video 1 Video...

Страница 156: ...n regional networks usually Cisco routers incorporate Cisco IOS software which offers advanced software features including quality of service QoS Weighted Fair Queuing WFQ and IP multicast EuroDOCSIS Cable Plants EuroDOCSIS based cable plants use EuroDOCSIS J 112 Annex A standard similar to the DAVIC DVB J 83 Annex A physical layer The MC16E builds on the DOCSIS protocol adding support at the phys...

Страница 157: ...STN Satellite feed Satellite feed Off air channels Off air channels Receiver MPEG encoder Remultiplexer and modulators Local streaming media servers Local streaming media caches STB Internet application servers MPEG VoD server Web caches Hub Cisco Universal Broadband Router uBR7200 HFC network Node STB Regional streaming media servers Regional streaming media caches Streaming media manager PSTN Ci...

Страница 158: ... packets and if defined manipulates the Type of Service ToS field in the IP packet header to accommodate QoS Note Cisco uBR7200 Series software supports extensions to DOCSIS 1 0 to operate with DOCSIS 1 0 based CMs or cable RF CPE devices such as Cisco uBR924 cable access routers or Cisco uBR910 series cable data service units that also support DOCSIS 1 0 extensions Tip DOCSIS 1 0 extensions addre...

Страница 159: ...the network During high upstream data loads the CMTS conserves the scarce upstream channel bandwidth resource and is more frugal in introducing upstream initial ranging slots The CMTS schedules bandwidth request minislots at low loads to provide low access delay At high upstream loads the CMTS reduces the number of contention based request minislots in favor of data grants while maintaining a mini...

Страница 160: ...em or STB supports the importance of the data and desired performance capabilities Your cable plant determines its data performance Design your network to maximize its performance and capacity at minimum cost while meeting subscriber data requirements Select or customize upstream profiles for maximum trade offs between bandwidth efficiency and upstream channel robustness once you re familiar with ...

Страница 161: ...of traffic is sent to a subscriber and the subscriber sends only a small amount of data upstream use ratios ranging from 5 1 to 10 1 Determine what data rate the service should support Define the maximum and minimum data rate answering the following questions Do you want to define the minimum data rate relative to the maximum Will the minimum data rate equal the maximum Will it be a percentage of ...

Страница 162: ...s burst intensive A group of subscribers therefore has an average data rate less than the maximum rate defined by the service Note For some services the average value might be the maximum rate VoIP is such an application How bandwidth contention is handled depends on the mix of services defined and individual service definitions Percentage of homes passed subscribing to the service is another fact...

Страница 163: ...g the Cisco uBR7200 Series Using the Setup Facility section on page 2 17 Describes how to use the Setup facility also called the System Configuration dialog for configuring your CMTS an alternative to AutoInstall Use the Setup facility prior to completing a WAN or LAN connection to your router The Setup facility supports several functions so that cable interfaces and cable interface line cards are...

Страница 164: ...the basic parameters of using passwords and describes initial configuration utilities that are available to you This section contains the following topics Preconfiguring the Cisco uBR7200 Series page 2 2 Booting and Logging onto the Cisco uBR7200 Series page 2 5 Setting Password Protection on the Cisco uBR7200 Series page 2 5 Recovering Passwords on the Cisco uBR7200 Series page 2 6 Preconfiguring...

Страница 165: ...ed in the DOCSIS RF Specifications http www cablemodem com specifications Configuration information for downstream and upstream interfaces is contained in Chapter 3 Configuring Cable Modem Interface Features Step 2 Ensure that your Cisco uBR7200 series router is installed in operational fashion Ensure that your Cisco uBR7200 series router is installed according to the instructions in the hardware ...

Страница 166: ...e enabled to perform the following tasks Transmit a DHCP request Receive an IP address Obtain TFTP and ToD server addresses Download a DOCSIS configuration file or updated software image if using Cisco uBR924 cable access routers or Cisco uBR910 cable data service units DSUs in your network Step 5 Verify sufficient and proper CPE Ensure that customer premises equipment CPE CMs or set top boxes STB...

Страница 167: ...or security purposes the EXEC has two levels of access to commands user EXEC mode and privileged EXEC mode The commands available at the user level are a subset of those available at the privileged level Tip Because many privileged level EXEC commands are used to set operating parameters password protect these commands to prevent unauthorized use Command or Action Purpose Step 1 Connect a terminal...

Страница 168: ...ed as uppercase or lowercase Passwords should be different for maximum security If you enter the same password for both during the setup script the system accepts it but you receive a warning message indicating that you should enter a different password Recovering Passwords on the Cisco uBR7200 Series This section describes how to recover a lost enable or console login password and how to replace ...

Страница 169: ...on usually in NVRAM is ignored This allows you to log in without using a password and to display the startup configuration passwords Cisco recommends setting the configuration register to 0x142 Step 4 Power cycle the router by turning power off and then back on Step 5 Log in to the router and enter the privileged EXEC mode Step 6 Enter the show startup config command to display the passwords Step ...

Страница 170: ...tializes the configuration register is set to 0x142 the router boots the system image from Flash memory and enters the System Configuration dialog setup as follows System Configuration Dialog Step 8 Enter no in response to the System Configuration dialog prompts until the following message appears Press RETURN to get started Step 9 Press Return The user EXEC prompt appears as follows Router Step 1...

Страница 171: ... individual passwords by using the no form of the previous commands For example entering the no enable secret command removes the enable secret password Step 16 You must configure all interfaces to not be administratively shut down as follows Router config interface fast ethernet 0 0 Router config no shutdown Enter the equivalent commands for all interfaces that were originally configured If you o...

Страница 172: ...he AutoInstall Procedure section on page 2 12 Setting Up the TFTP Server for Autoinstall section on page 2 15 Setting Up the BOOTP or RARP Server for Autoinstall section on page 2 16 Connecting the New Router to the Network section on page 2 16 Autoinstall Requirements For AutoInstall to work properly the following conditions must be met Routers must be attached physically to the network using one...

Страница 173: ...nfig command to write the configuration data to the router s nonvolatile random access memory NVRAM Router copy running config startup config Completing this step saves the configuration settings that the AutoInstall process created to NVRAM If you fail to do this your configuration will be lost the next time you reload the router Step 4 Choose your preferred method to verify the required file con...

Страница 174: ...AutoInstall Procedure This procedure provides the steps to configure your Cisco uBR7200 series router using AutoInstall Note For a detailed description of the processes involved with AutoInstall refer to the chapter titled Using Configuration Tools in the Cisco IOS Configuration Fundamentals Configuration Guide Release 12 1 on Cisco com To dynamically configure a new router using AutoInstall compl...

Страница 175: ...n IP address for the interface The host portion of the address must have a value of 1 or 2 AutoInstall over Frame Relay does not have this address constraint Step 3 ip helper address address Configures a helper address for the serial interface to forward broadcasts associated with the TFTP BOOTP and DNS requests Step 4 clock rate bps Optional Configures a DCE clock rate for the serial line unless ...

Страница 176: ...72 31 20 20 255 255 255 0 encapsulation frame relay frame relay map ip 172 31 10 1 255 255 255 0 48 ip helper address 172 31 20 5 Command Purpose Step 1 interface serial 0 Configures the serial interface that connects to the new router and enters interface configuration mode Step 2 encapsulation frame relay Configures Frame Relay encapsulation on the interface that connects to the new router Step ...

Страница 177: ...confg or name cfg filename must match the host name you assigned for the new router in the previous step Enter configuration commands for the new router into this file The name confg or the name cfg file can contain either the new router s full configuration or a minimal configuration The minimal configuration file is a virtual terminal password and an enable password It allows an administrator to...

Страница 178: ...s the minimum set of commands needed for AutoInstall using RARP It includes the IP address that will be obtained dynamically via BOOTP or RARP during the AutoInstall process When RARP is used this extra information is needed to specify the proper netmask for the interface interface ethernet 0 ip address 131 108 10 2 255 255 255 0 enable password letmein line vty 0 password letmein end Connecting t...

Страница 179: ... after the Setup facility was run You had to use the CLI to configure a fixed frequency or create a spectrum group assign an interface to it and enable each upstream port on a cable interface line card The Setup facility now supports configuring and enabling upstream parameters The Setup facility supports the following functions so that cable interfaces and cable interface line cards are fully ope...

Страница 180: ...ed Rights clause at FAR sec 52 227 19 and subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS sec 252 227 7013 cisco Systems Inc 170 West Tasman Drive San Jose California 95134 1706 Cisco Internetwork Operating System Software IOS tm 7200 Software UBR7200 IK1S M Version 12 1 10 EC TAC Support http www cisco com tac Copyright c 1986 2001 by cisco Systems Inc Co...

Страница 181: ...gs are in square brackets Basic management setup configures only enough connectivity for management of the system extended setup will ask you to configure each interface on the system Step 3 When asked if you want to continue with the System Configuration dialog and enter basic management setup displays the current interface summary enter yes or press Return Continue with configuration dialog yes ...

Страница 182: ...e card slot 3 The Setup facility determines the status of all interfaces To configure each active interface port for IP enter yes the default or press Return For all inactive ports the default is no You can press Return to accept the default Configuring interface Ethernet 1 0 Is this interface in use yes Configure IP on this interface yes IP address for this interface 19 2 22 4 Number of bits in s...

Страница 183: ...ied Configuring Upstream Frequencies with the Setup Facility Upstream parameters must be configured manually After the Setup facility is run upstream ports have a default state of shutdown You have two methods to configure upstream channel frequencies Configure a fixed frequency between 5 to 42 MHz for North American channel plans and enable the upstream port Create a global spectrum group assign ...

Страница 184: ...onfiguring Interfaces with the Setup Facility Follow the procedure in this section to configure WAN or LAN interfaces To configure interface parameters have your interface network addresses and subnet mask information ready Configuring Ethernet Interfaces Step 1 In the following example the system is being configured for an Ethernet LAN using IP Respond to the prompts as follows using your own add...

Страница 185: ...to NVRAM Router copy running config startup config Note You must always manually save the configuration settings to NVRAM whenever they are modified The following sample display includes a continuous listing of all interface configuration parameters selected for Ethernet and synchronous serial interfaces These parameters are shown in the order in which they appear on your console terminal Tip Only...

Страница 186: ...terface serial0 0 ip address 1 1 1 20 255 0 0 0 ip route cache cbus no keepalive router igrp 15 network 1 0 0 0 end Use this configuration yes no yes OK Use the enabled mode configure command to modify this configuration Press RETURN to get started Your Cisco uBR7200 series router is now minimally configured and is ready to use Use the setup command in provileged EXEC mode if you want to modify th...

Страница 187: ...DHCP time of day TOD Trivial File Transfer Protocol TFTP a static route must exist to the host Configuring the Cable Interface with the Extended Setup Facility The Setup facility creates an initial configuration The basic management setup configures only enough connectivity for management of the system The Extended setup facility prompts you to configure each interface on the system To invoke the ...

Страница 188: ...ream port number Upstream port number Use this format show interfaces cable slot downstream port upstream upstream port Use the slot number downstream port number and upstream port number to display information about an upstream interface You can abbreviate the command to sh int c The following example shows the display for upstream channel port 0 in cable interface slot 3 of a Cisco uBR7200 serie...

Страница 189: ...wing configuration command script is created interface cable5 0 ip address 10 20 133 65 255 255 255 248 no ip mroute cache no keepalive cable insertion interval 500 cable downstream annex B cable downstream modulation 64qam cable downstream interleave depth 32 cable downstream frequency 531000000 cable upstream 0 frequency 33808000 cable upstream 0 power level 0 no cable upstream 0 shutdown cable ...

Страница 190: ...eq hz Note This command has no effect on the external upconverter It is informational only Step 7 Activate the downstream port on the cable interface line card to support digital data transmission over the hybrid fiber coaxial network Router config int no shutdown Step 8 Enter the fixed center frequency in Hz for your downstream RF carrier and the port number Router config int cable upstream port ...

Страница 191: ...ommand to verify the current value of an upstream port frequency Router show controllers cable slot port upstream Use the following command to check the value of the settings you entered Router show running config To review changes you make to the configuration use the EXEC show startup config command to display the information stored in NVRAM Viewing Sample Configuration Files This section provid...

Страница 192: ... configuration mode To restore the default values use the no form of each command cable privacy kek grace time seconds life time seconds no cable privacy kek grace time life time cable privacy tek grace time seconds life time seconds no cable privacy tek grace time life time Syntax Description Tip Use the show cable modem command to identify a CM with encryption and decryption enabled The online p...

Страница 193: ...figure the Cisco cable interface line card for correct operation on the hybrid fiber coaxial HFC cable network This chapter describes the several required and optional tasks that configure the Cisco cable interface line card Note For additional information about CMs on the HFC network refer to Chapter 5 Managing Cable Modems on the Hybrid Fiber Coaxial Network Perform the tasks in the following se...

Страница 194: ...path Activating Downstream Ports section on page 3 3 Provides instructions to activate and verify a downstream port on a cable interface card for digital data transmissions over the HFC network Assigning the Downstream Channel ID section on page 3 5 Provides instructions to assign and verify a numeric channel ID to the downstream port on the Cisco cable interface line card Configuring Downstream R...

Страница 195: ...eam modulation 64qam cable downstream interleave depth 32 cable downstream symbol rate 5056941 cable upstream 0 frequency 15008000 no cable upstream 0 shutdown Tip If you are having difficulty with verification verify that you entered the correct port and cable interface line card slot number when you activated ARP and when you entered the show interface cable command Activating Downstream Ports T...

Страница 196: ... upconverter Note The cable downstream frequency command has no effect on external upconverters If you are using an external upconverter this command is informational only and you must configure the external upconverter separately using its own command procedures Enable the integrated upconverter The integrated upconverter is disabled by default and must be enabled with the no cable downstream rf ...

Страница 197: ... PC2D0107 SW Rev 007 NVRAM Rev 006 ECI number 123456 Downstream Frequency 525 0000 MHz IF Power 0 3 dBmv RF Power 51 0 dBmv If the center frequency has not been configured the frequency is shown as not set as shown in the following example Router show controllers cable1 0 downstream Cable1 0 Downstream is up Frequency is not set Channel Width 6 MHz 64 QAM Symbol Rate 5 056941 Msps FEC ITU T J 83 A...

Страница 198: ...equency 96000000 Channel Width 6 MHz 64 QAM Symbol Rate 5 056941 Msps FEC ITU T J 83 Annex B R S Interleave I 32 J 4 Downstream channel ID 1 Configuring Downstream Rate Limiting and Traffic Shaping To configure downstream traffic shaping use the following command in cable interface configuration mode Note Using Cisco IOS Release 12 0 5 T1 or higher the software adds downstream calendar queuing rou...

Страница 199: ...outer show running config Building configuration Current configuration interface cable5 0 ip address 10 254 254 254 255 0 0 0 no ip directed broadcast cable helper address 192 168 1 1 no keepalive Perform these steps if you are having difficulty with verification Step 1 Check the cables upconverters RF levels and frequencies if the cable interfaces do not find a downstream signal Step 2 Check the ...

Страница 200: ...ng the Downstream Interleave Depth To verify the downstream interleave depth setting enter the show controllers cable command for the downstream port you have just configured Router show controllers cable5 0 downstream Cable5 0 Downstream is up Frequency 96000000 Channel Width 6 MHz 64 QAM Symbol Rate 5 056941 Msps FEC ITU T J 83 Annex B R S Interleave I 32 J Perform these steps if you are having ...

Страница 201: ...e steps if you are having difficulty with verification Step 1 Ensure that the cable connections are not loose or disconnected Step 2 Ensure that the cable interface line card is firmly seated in its chassis slot Step 3 Ensure that the captive installation screws are tight Step 4 Verify that you have entered the correct slot and port numbers Step 5 Verify that the downstream carrier is active using...

Страница 202: ...gured and enabled a traffic shaping entry appears in the output If downstream traffic shaping is disabled no traffic shaping entry appears Router show running config Command Purpose Step 1 Router config if cable downstream rate limit token bucket Router config if cable downstream rate limit token bucket shaping Router config if cable downstream rate limit token bucket shaping granularity 8 Router ...

Страница 203: ...al in addition to error detection and correction of the upstream signal The configuration of the upstream cable interface depends on the characteristics of your cable plant Perform the following tasks in this section to configure the upstream cable interface Note For some of these tasks default values are adequate to configure the device Task Description Activating Upstream Admission Control secti...

Страница 204: ...to be buffered on the cable CPE device instead of being dropped Setting Upstream Backoff Values section on page 3 19 Provides DOCSIS compliant instructions that define contention resolution for CMs wanting to transmit data or requests on the upstream channel Contention resolution is achieved with a truncated binary exponential backoff value Setting the Upstream Channel Width section on page 3 21 P...

Страница 205: ...figuration information If upstream admission control is configured and enabled an admission control entry appears in the show running config command output indicating the user defined percentage of upstream channel capacity allowable If upstream admission control is disabled no admission control entry appears in the output Perform these steps if you are having difficulty with verification Step 1 E...

Страница 206: ...rror Correction The Cisco uBR7200 series CMTS uses forward error correction FEC to attempt to correct any upstream data that might have been corrupted When FEC is activated all CMs on the network also activate FEC Note Although upstream FEC is an option Cisco recommends that you use upstream FEC FEC is activated by default and should not be disabled To activate the upstream forward error correctio...

Страница 207: ... 7a60 Internet address is 1 1 1 3 24 MTU 1500 bytes BW 27000 Kbit DLY 1000 usec rely 255 255 load 1 255 Encapsulation loopback not set keepalive not set ARP type ARPA ARP Timeout 04 00 00 Last input 00 00 25 output 00 00 00 output hang never Last clearing of show interface counters never Queuing strategy fifo Output queue 0 40 0 drops input queue 0 75 0 drops 5 minute input rate 0 bits sea 0 packe...

Страница 208: ...r a specified cable interface use one of the following commands in cable interface configuration mode To return the automatic upstream power adjustment ranging value to the default of 2 dB enter the following command in cable interface configuration mode Router config if no cable upstream usport power adjust continue To return the automatic upstream power adjustment noise value to the default of 3...

Страница 209: ...smissions The scrambler circuitry improves reliability of the upstream receiver on the cable interface line card Caution The upstream scrambler is activated by default and should not be disabled under normal circumstances Disabling it can result in corrupted packets Disable it only for prototype modems that do not support the upstream scrambler To activate the upstream scrambler use the following ...

Страница 210: ...fy that the cable interface line card is firmly seated in its chassis slot Step 3 Verify that the captive installation screws are tight Step 4 Confirm that you have entered the correct slot and port numbers Configuring Upstream Rate Limiting and Traffic Shaping You can configure rate limiting and traffic shaping on a DOCSIS upstream channel This delays the scheduling of the upstream packet which i...

Страница 211: ...Backoff Values The DOCSIS specified method of contention resolution for CMs wanting to transmit data or requests on the upstream channel is a truncated binary exponential backoff value with the initial backoff window and the maximum backoff window controlled by the CMTS The Cisco uBR7200 series CMTS specifies backoff window values for both data and initial ranging and sends these values downstream...

Страница 212: ...latively large number of cable interfaces for example more than 1600 might suffer recovery times greater than 10 minutes Verifying Upstream Data Backoff To verify backoff window settings enter the show controllers cable command for the upstream port you have just configured Router show controllers cable5 0 u0 Cable5 0 Upstream 0 is up Frequency 24 016 MHz Channel Width 1 600 MHz QPSK Symbol Rate 1...

Страница 213: ...work you might experience packet loss or loss of cable interface connectivity Note For QAM 16 channel widths of 400 kHz 320 ksps or greater Cisco recommends that you use QAM 16 modulation for long and short data and that you use QPSK for request initial and station communications For QAM 16 channel widths of 200 kHz 160 ksps all communication must be able to use QAM 16 That is 160 ksps with QAM 16...

Страница 214: ...ensions as appropriate Setting the Upstream Frequency The upstream channel frequency of your RF output must be set to comply with the expected input frequency of your Cisco cable interface line card To configure upstream channel frequencies perform one of the following tasks Configure a fixed frequency from 5 to 42 MHz for NTSC operations then enable the upstream port Create a global spectrum grou...

Страница 215: ...3 2560 dB Nominal Input Power Level 0 dBmV Tx Timing Offset 2288 Ranging Backoff automatic Start 0 End 3 Ranging Insertion Interval automatic 60 ms Tx Backoff Start 0 Tx Backoff End 4 Modulation Profile Group 1 Note The upstream frequency displayed in the show controllers cable command output might not match the frequency that you entered when you set the upstream frequency The Cisco uBR7200 serie...

Страница 216: ...nd interval If you increase the power level by more than 5 dB within 30 seconds cable interface service on your network is disrupted If you decrease the power level by more than 5 dB within 30 seconds cable interfaces on your network are forced offline Note When you run the cable upstream 0 power level command Cisco recommends that the adjacent channel not have a large variation The recommended ma...

Страница 217: ...command for the upstream port you have just configured Router show controllers cable5 0 u0 Cable5 0 Upstream 0 is up Frequency 24 016 MHz Channel Width 1 600 MHz QPSK Symbol Rate 1 280 Msps Spectrum Group is overridden SNR 33 2560 dB Nominal Input Power Level 0 dBmV Tx Timing Offset 2288 Ranging Backoff automatic Start 0 End 3 Ranging Insertion Interval automatic 60 ms Tx Backoff Start 0 Tx Backof...

Страница 218: ...ream usport rate limit The software supports Generic calendar queuing routines New token bucket policing function Grant shaping application of the calendar queues Upstream rate shaping option to the token bucket keyword A default state change from 1 second burst policing to token bucket with shaping Tip Upstream grant shaping is per CM per service ID SID Shaping can be enabled or disabled for the ...

Страница 219: ... that modem is less than its configured peak rate due to the timeouts and backoffs produced by the drop in bandwidth requests Enter the show interface cx y service flow qos command to see the input rate at CMTS in bps Step 3 Enable grant shaping on the upstream channel by using the new shaping keyword extension to the token bucket algorithm CLI command Step 4 Make the CM exceed its peak upstream r...

Страница 220: ... task are adequate in most cases to configure the Cisco uBR7200 series CMTS Activating Cable Proxy ARP Requests To activate cable proxy ARP for host to host communications use the following command in cable interface configuration mode Verifying Cable Proxy ARP Requests To verify if cable proxy ARP has been activated or deactivated enter the more system running config command and look for the cabl...

Страница 221: ...e interface is prepended with its associated SID this can be extracted from the packet and used as the key to find the associated software IDB The defined cmts_sid_instance_t structure holds information pertaining to the SID and is extended to include the associated software IDB pointer The IP address stored in the DHCP reply is matched for its subnet value against the subnet value configured for ...

Страница 222: ...Bundling Cable interface bundling allows you to reduce the number of subnets consumed per Cisco uBR7200 series Multiple cable interfaces can share a single IP subnet An IP subnet is required for each bundle You can bundle all cable interfaces on a Cisco uBR7200 series into a single bundle Using the CLI first configure a master interface for a cable interface bundle The master interface has an IP a...

Страница 223: ...he interface to a bundle If you have configured an IP address on a bundled interface and the interface is not the master interface a warning message appears Specify generic that is not downstream or upstream related cable interface configurations such as source verify or ARP handling on the master interface Do not specify generic configuration on non master interfaces If you configure an interface...

Страница 224: ...ied interface use the show cable bundle command in privileged EXEC mode A sample is shown below Router show cable bundle 25 forwarding table MAC address Interface 0050 7366 17ab Cable3 0 0050 7366 1803 Cable3 0 0050 7366 1801 Cable3 0 The following example shows how to bundle a group of physical interfaces In this example the interfaces int c5 0 and int c4 0 are bundled int c5 0 ip address 209 165...

Страница 225: ...optional IP parameters Activating IP Multicast Echo section on page 3 33 Activating IP Broadcast Echo section on page 3 34 Note The default values for the commands used in these configuration steps are adequate in most cases to configure the Cisco uBR7200 series CMTS Activating IP Multicast Echo The Cisco uBR7200 series CMTS echos IP multicast packets by default To activate IP multicast echo if it...

Страница 226: ... If you are having difficulty with verification make sure that you entered the correct slot and port numbers when you entered cable interface configuration mode Activating IP Broadcast Echo By default the Cisco uBR7200 series CMTS does not echo IP broadcast packets To activate IP broadcast echo use the following command in cable interface configuration mode To disable IP broadcast echo when it is ...

Страница 227: ...ces only it is authorized to access Note Because DOCSIS 1 0 BPI does not authenticate CMs it does not protect against users employing cloned CMs masquerading as authorized CMs Specific Cisco IOS releases provide protection against spoofing and provide supporting commands that can be used to configure source IP filtering on RF subnets to prevent a user from using a source IP address that is not val...

Страница 228: ... of DOCSIS all DOCSIS certified CMs and qualified CMTS are fully interoperable Figure 4 1shows a BPI architecture Note CMs must have factory installed RSA private public key pairs to support internal algorithms to generate key pairs prior to first BPI establishment A SID s keying material has a limited life span When the CMTS delivers SID keying material to a CM it also provides the CM with the li...

Страница 229: ...it is decrypted and sent to user B In this manner an unauthorized user is not able to see unencrypted traffic between user A and user B Caution Since BPI occurs only on the cable TV network however all traffic going upstream will be decrypted as it passes the CMTS If user A is attempting to communicate with someone beyond the cable network user C all traffic beyond the CMTS will not be encrypted F...

Страница 230: ...ded a BPI to protect user data privacy across the shared medium cable network and to prevent unauthorized access to DOCSIS based data transport services across the cable network BPI encrypts traffic across the RF interface between the cable modem and CMTS and also includes authentication authorization and accounting AAA features BPI supports access control lists ACLs tunnels filtering protection a...

Страница 231: ... maintenance list and resets the cable modem or all CMs on the network Configuring Cable Modem Registration Timeout section on page 5 6 Specifies the registration timeout interval for CMs connected to the Cisco uBR7200 series CMTS Configuring Dynamic Contention Algorithms Cable Insertion Interval Range and Data Backoff section on page 5 6 Configures the algorithms that control the capacity of the ...

Страница 232: ...tains a matching key Note The Cisco uBR7200 series router will accept any DOCSIS configuration file with any shared secret if the CMTS configuration does not contain a setting for shared secret However if the CMTS configuration contains a setting for shared secret the settings between the DOCSIS configuration file and the CMTS configuration must match The shared secret for the CMTS configuration m...

Страница 233: ...r the first time from the Cisco uBR7200 series A CM s initial channel request is known as insertion The valid range is 100 to 2000 milliseconds To activate the CM insertion interval use the following command in cable interface configuration mode Validating Cable Modem Insertion Interval To verify that a CM insertion interval has been set enter the more system running config command and look for th...

Страница 234: ...cation has been deactivated it does not appear in this output If CM upstream verification has been activated it appears in this output as cable source verify as shown in this command output excerpt Router more system running config Building configuration Current configuration interface Cable5 0 ip address 1 1 1 1 255 255 255 0 no keepalive cable source verify cable insertion interval 2000 cable do...

Страница 235: ...reset command It might take up to 30 seconds for the CM to start the reset sequence Note The clear cable modem reset command is useful if a Simple Network Management Protocol SNMP manager is not available or if the CM is unable to obtain an IP address or respond to SNMP messages Command Purpose clear cable modem mac addr counters Clears the counters in the station maintenance list for the CM with ...

Страница 236: ...he frequency of initial ranging slots using the data grant utilization on the upstream channels The CMTS trades upstream bandwidth between data grants and initial ranging slots The CMTS autodetects a high collision state and switches to low insertion interval mode after a steady state is achieved where few collisions occur The CMTS is careful when monitoring the ranging channel health to revert to...

Страница 237: ...ment system and software latencies The default value is 1000 usecs You can vary this value from 500 to 1500 usecs This argument is a delta value added to the dynamic map advance setting that the algorithm computes Using larger safety factors increases the run time lookahead in MAPs but reduces the upstream performance Use the static keyword for the cable map advance command The Cisco uBR7200 serie...

Страница 238: ...s list access name cable modem mac addr ip addr no access group Syntax Description Examples The following example shows the cable modem access group command assigning access list 1 to the CM with the MAC address of abcd ef01 2345 Router cable modem abcd ef01 2345 access group 1 This command configures access lists to be specified on a per interface and per direction basis The packets received from...

Страница 239: ...formation from the Cisco uBR7200 series 6 The login server sets per CPE filter in the Cisco uBR7200 series The per CPE filter overrides the per modem filter settings 7 If the CM goes offline for a brief period of time filters defined using the Cisco uBR7200 series remain active If a CM stays offline for more than 24 hours filter settings are reset 8 If the user logs out or the login server detects...

Страница 240: ...5 10 Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide OL 2239 03 Chapter 5 Managing Cable Modems on the Hybrid Fiber Coaxial Network Configuring Sync Message Interval ...

Страница 241: ...ls to the upconverter which translates the downstream signals to RF for broadcast Receivers scramblers and descramblers then process the TV signals to encode or decode signals as needed for broadcast Modulators format the analog TV and digital signals The analog and digital signals then pass through the RF combiner The signals are broadcast from the headend through optical transmitters to fiber no...

Страница 242: ... configuration file length The Cisco uBR7200 series CMTS automatically connects DOCSIS compliant CMs and hosts right out of the box Therefore the factory supplied configuration activates the downstream RF to 851 MHz center frequency and the upstream to 37 MHz Step 1 Connect one upstream port and the downstream port to a duplex filter Note Do not combine multiple ports because they are all set on t...

Страница 243: ...dth of 10 kbps The downstream has a maximum bandwidth of 10 Mbps Up to 8 PCs are allowed on this connection gold cm Users are given a maximum upstream bandwidth of 64 kbps and a maximum downstream bandwidth of 5 Mbps Up to 3 PCs are allowed on this connection silver cm Users are given a maximum upstream bandwidth of 64 kbps and a maximum downstream bandwidth of 1 Mbps Only 1 PC is allowed on this ...

Страница 244: ...255 255 0 bootfile platinum cm next server 10 128 1 1 default router 10 128 1 1 option 128 ip 10 128 1 1 option 4 ip 10 128 1 1 option 2 hex ffff 8f80 option 11 ip 10 128 1 1 option 10 ip 10 128 1 1 lease 1 0 10 ip dhcp pool hosts network 10 254 1 0 255 255 255 0 next server 10 254 1 1 default router 10 254 1 1 dns server 10 254 1 1 10 128 1 1 domain name ExamplesDomainName com lease 1 0 10 ip dhc...

Страница 245: ...e upstream 2 admission control 150 no cable upstream 2 shutdown cable upstream 3 description Cable upstream interface West cable upstream 3 frequency 37008000 cable upstream 3 power level 0 cable upstream 3 admission control 150 no cable upstream 3 shutdown no cable arp cable source verify dhcp cable dhcp giaddr policy ip classless no ip forward protocol udp netbios ns ip route 0 0 0 0 0 0 0 0 Fas...

Страница 246: ... 34 0 48 16qam scrambler 152 no diff 256 fixed uw16 cable modulation profile 3 short 5 75 6 8 16qam scrambler 152 no diff 144 fixed uw8 cable modulation profile 3 long 8 220 0 8 16qam scrambler 152 no diff 160 fixed uw8 In this case the user has configured modulation profile number 3 to be available to upstream channels wherever they are configured to apply it Note that this modulation profile has...

Страница 247: ...individual DHCP options define the identity or type of device on the network and assign the device to a predefined class or group Using the CNR tool a cable system administrator can specify policies to provide Integrated DHCP and Domain Name Server DNS services Time of Day ToD and Trivial File Transfer Protocol TFTP server based on the size of the network DHCP safe failover and dynamic DNS updates...

Страница 248: ...he local time when time stamping error logs Time server address from which the cable interface obtains the current time DOCSIS DHCP Fields DOCSIS DHCP option requirements include IP address of the next server to use in the TFTP bootstrap process this is returned in the siaddr field DOCSIS configuration file that the cable interface downloads from the TFTP server Note If the DHCP server is on a dif...

Страница 249: ... Cable Modem Scripts To support two way configurations at a subscriber site use these scripts Relay tcl SetRouter tcl Telco Return Cable Modem Scripts To support telco return and two way cable interface configurations on the same cable interface card or chassis use these scripts PostClientLookup tcl PrePacketEncode tcl Placement of Scripts Windows NT For CNR running on Windows NT place the appropr...

Страница 250: ... a BOOTP forwarder and have the relay option enabled The primary and secondary IP addresses for each cable interface must be in sync with the CNR tool To properly communicate with scripts in the system implement the following commands on the Cisco uBR7200 series universal broadband router On Cisco IOS Release 11 3 Command is interface specific cable relay agent option This enables Option82 on the ...

Страница 251: ...using BOOTP Time server IP address Time offset Hex value 1440 for Eastern Standard Time Packet siaddr IP address of CNR Router set to 0 0 0 0 Boot file name of cm file for those cable interfaces using BOOTP Packet file name cm file name PCs Define these settings following the CNR tool documentation Domain name Name servers IP address of DNS servers Create Selection Tag Scopes General When you crea...

Страница 252: ...toledo1_3 0 10 3 0 0 255 255 0 0 assignable 10 3 0 10 10 3 254 254 tagCablemodem tagTelcomodem Default GW 10 3 0 1 assigned by scripts pc toledo1_2 0 208 16 182 0 255 255 255 248 assignable 208 16 182 2 208 16 182 6 tagComputer Default GW 208 16 182 1 assigned by scripts pc toledo1_3 0 208 16 182 8 255 255 255 248 assignable 208 16 182 10 208 16 182 14 tagComputer Default GW 208 16 182 9 assigned ...

Страница 253: ...re configured Here is an example If you have configured two ISP subinterfaces and one management subinterface on a Cisco uBR7200 series make sure that the management subinterface is the first subinterface that is configured If cable interface three c3 0 is being used create c3 0 1 c3 0 2 and c3 0 3 as three subinterfaces and c3 0 1 as the first subinterface configured as the management subinterfac...

Страница 254: ... ISP2 and assign them to isp2 client class Also assign the scope selection tag isp2 cm tag Step 7 Enable client class processing from the scope selection tag window Note Overlapping address ranges cannot be configured on these subinterfaces because software gleans the DHCP reply to figure out the subinterface it really belongs to Although CNR can be configured with overlapping address range scopes...

Страница 255: ...section on page 8 6 Uses a Cisco uBR924 cable access modem to verify the downstream signal originating from a Cisco uBR7200 series router Performing Amplitude Averaging section on page 8 7 The system uses an averaging algorithm to determine the optimum power level for a CM with low carrier to noise ratio that is making excessive power adjustments known as flapping This section shows how you can in...

Страница 256: ...o uBR7200 series the sort option applies to one line card at a time then the list is merged together For example the flap list is sorted for cable7 0 appears on the console and then is sorted for cable 7 1 which then appears on the console and so on The show cable flap list and show cable modem commands indicate when the Cisco uBR7200 series CMTS has detected an unstable return path for a particul...

Страница 257: ...n for each CM on each interface Summary display of the total number of modems connected for each upstream channel Total number of registered and unregistered modems for the specified interface or upstream Total number of offline modems for the specified interface or upstream and status for each offline modem before it went offline show cable modem maintenance To display station maintenance error s...

Страница 258: ...ow cable qos profile command The display shows ToS specifications Router show cable qos profile Service Prio Max Guarantee Max Max tx TOS TOS Create B class upstream upstream downstream burst mask value by priv bandwidth bandwidth bandwidth enab 1 0 0 0 0 0 0x0 0x0 cmts r no 2 0 64000 0 1000000 0 0x0 0x0 cmts r no 3 0 1000 0 1000 0 0x0 0x0 cmts no 4 3 256000 0 512000 0 0x0 0x0 cm no 5 5 1000000 0 ...

Страница 259: ...d 3699 broadcasts 0 runts 0 giants 0 throttles 3 input errors 3 CRC 0 frame 0 overrun 0 ignored 0 abort 5412 packets output 646488 bytes 0 underruns 0 output errors 0 collisions 13082 interface resets 0 output buffer failures 0 output buffers swapped out The show interface cable upstream command is enhanced to display details on the MAC scheduler state for an upstream port New items in the display...

Страница 260: ...though the exact value displayed varies from CM to CM values collected on the same CM from measurement to measurement will be consistent Maximizing SNR optimizes CM reliability and service quality show interface cable sid To display the service identifier SID for a CM use the show interface cable sid command in privileged EXEC mode The following sample output from the show interface cable sid comm...

Страница 261: ...n this modem An exclamation point indicates that the modem has reached maximum transmit power Output of the show cable modem command appears below Router show cable modem MAC Address IP Address I F MAC Prim RxPwr Timing Num BPI State Sid db Offset CPEs Enbld 0050 04f9 edf6 10 44 51 49 C7 1 U0 online 1 0 50 3757 0 no 0050 04f9 efa0 10 44 51 48 C7 1 U0 online 2 0 50 3757 0 no 0030 d002 41f5 10 44 51...

Страница 262: ...cable interface line cards or 5 dB on FPGA versions are not recommended If the flap list shows CMs with a large number of power adjustments but the CMs are not detected as noisy you might try to decrease the percentage for noisy If you think that too many CMs are unnecessarily detected as noisy you might try to increase the percentage Setting Frequency Threshold to Affect Power Adjustment To contr...

Страница 263: ...sks to create PRBS and unmodulated carrier test signals Configuring Unmodulated Test Signals section on page 8 9 Configuring PRBS Test Signals section on page 8 10 Verifying Test Signal Output section on page 8 10 Configuring Unmodulated Test Signals Syntax Description n Specifies the upstream port number averaging Specifies that a percentage of frequency adjustment packets is required to change t...

Страница 264: ...works with CMs that do not have an IP address This allows cable operators to ping CMs that are unable to complete registration that have internal bugs or that are unresponsive due to a crash The Ping DOCSIS feature includes a real time view and plot of requested power adjustments and a measure of optimal headend reception power This gives the cable operator the ability to solicit a configurable nu...

Страница 265: ...rivileged EXEC mode To deactivate debugging of ARP requests use the no form of this command debug cable arp When this command is activated all cable ARP request messages are displayed on the Cisco uBR10000 series router console debug cable error for MAC Protocol Errors To display errors that occur in the cable MAC protocols use the debug cable error command in privileged EXEC mode To disable debug...

Страница 266: ...EC mode To deactivate the debugging of cable MAC messages use the no form of this command debug cable mac messages no debug cable mac messages When this command is activated messages generated by the cable MAC are displayed on the Cisco Cisco uBR7200 series console debug cable map To display map debugging messages use the debug cable map command in privileged EXEC mode Use the no form of this comm...

Страница 267: ...nsole debug cable range for Ranging Messages To activate the debugging of ranging messages from cable interfaces on the HFC network use the debug cable range command in privileged EXEC mode To deactivate debugging of cable interface ranging use the no form of this command debug cable range no debug cable range When this command is activated ranging messages generated when cable interfaces request ...

Страница 268: ...this command debug cable reset no debug cable reset When this command is activated reset messages generated by cable interfaces are displayed on the Cisco uBR10000 series router console debug cable specmgmt for Spectrum Management To activate the debugging of spectrum management frequency agility on the HFC network use the debug cable specmgmt command in privileged EXEC mode To deactivate debuggin...

Страница 269: ... messages generated when cable interfaces request or are assigned a new channel use the debug cable ucc command in privileged EXEC mode To deactivate debugging of cable upstream channel changes use the no form of this command debug cable ucc no debug cable ucc When this command is activated messages related to upstream channel changes are displayed on the Cisco uBR10000 series router console debug...

Страница 270: ...8 16 Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide OL 2239 03 Chapter 8 Troubleshooting the System Using Cable Interface debug Commands ...

Страница 271: ...ages are stored see Step 2 below Most TFTP applications provide a setup routine to assist in these configuration tasks Note The TFTP server included on the software feature pack CD ROM can be used on a PC running Windows 95 For other operating system s a number of TFTP or rcp applications are available from independent software vendors or as shareware from public sources on the World Wide Web The ...

Страница 272: ...TFTP software upgrade to be sure that the addresses are within the same range Ping the router access server to verify that a network connection exists between them More information on IP addresses is available in Appendix B Resolving Common Image Installation Problems Step 3 Copy the new software image from the TFTP server to the router access server using the following commands Router enable Pass...

Страница 273: ...ds a Verify that the image is properly installed and that the boot system commands point to the proper file to load Information about verifying the image and boot commands is available in Appendix B Resolving Common Image Installation Problems b To reload the image type Router reload Mar 1 00 30 49 972 SYS 5 CONFIG_I Configured from console by console System configuration has been modified Save ye...

Страница 274: ...22 11802988 Jan 22 2000 00 23 18 rsp jsv mz 1 20 8 0 2 T Router show slot1 ED type crc seek nlen length date time name 1 unknown 6A2B4BA7 6FA9E0 20 7186784 Jul 30 1999 15 05 19 rsp jv mz 11 1 26 CC1 2 config 631F0D8B 6FB1EC 6 1929 Oct 19 1999 06 15 49 config 3 config 631F0D8B 6FB9F8 7 1929 Oct 19 1999 06 16 03 config1 Router copy slot0 slot1 Source filename rsp jsv mz 120 8 0 2 T Destination filen...

Страница 275: ...le TFTP load requests null Allow URL file TFTP load requests nvram Allow URL file TFTP load requests system Allow URL file TFTP load requests Router config tftp server Router config tftp server flash flash c2500 jos56i l 120 9 bin Router config tftp server flash c2500 jos56i l 120 9 bin Router config Z Router Step 3 After the TFTP server is configured you can download the specified image from the ...

Страница 276: ...A 6 Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide OL 2239 03 Appendix A Installing or Upgrading Cisco IOS Software Copying a System Image from One Device to Another ...

Страница 277: ...de Avoid using the saving commands write mem or copy run start and respond no to any prompt suggesting that you save your current configuration If you save while you are in this mode your configuration can be partially or completely erased Resolving Default Gateway Issues Determining the Default Gateway for the Router The default gateway is always the next hop that any packet will have to cross to...

Страница 278: ...address is 172 17 3 192 and the mask is 255 255 0 0 In this example the TFTP server and this interface of the router are in the same network so a default gateway is not required Example 2 The TFTP server IP address is 172 17 247 195 and the mask is 255 255 0 0 The interface Ethernet 0 of the router IP address is 172 10 3 192 and the mask is 255 255 0 0 In this example they are on different IP netw...

Страница 279: ...a show flash command you may see something similar to the following example Router show flash PCMCIA flash directory File Length Name status 1 3437967 c1600 sy mz 120 8 0 2 T 2 3489036 c1600 y l 112 19 P1 3 290304 c1600 y l 112 18 P invalid checksum In both cases a checksum failure indicates that the file has not been properly copied into the memory and you need to copy it again First verify that ...

Страница 280: ... image from one device to another use the copy command in global configuration mode copy tftp Step 2 Refer to the Cisco IOS Configuration Fundamentals Command Reference Release 12 2 for additional information about the copy command Methods vary according to different platforms The three most common forms of the copy command for this purpose are as follows copy tftp flash copy rcp flash copy slot0 ...

Страница 281: ...oot system commands defined in the configuration file Router en Password Router conf t Enter configuration commands one per line End with CNTL Z Router config Router config boot system flash c1600 y l 112 18 P Router config boot system flash Troubleshooting Problems by Verifying the Software Image Resolving the show version Command not Displaying Proper Image If the show version command output doe...

Страница 282: ...d to start the installation again Be aware that the size is listed in bytes in the router and is sometimes listed in kbytes in TFTP servers Step 2 Verify that the boot system commands are in the right order in the configuration The router stores and executes the boot system commands in the order in which you enter them in the configuration file If a boot system command entry in the list specifies ...

Страница 283: ... service password encryption hostname uBR7246 boot system flash slot0 ubr7200 p mz 120 5 T boot system flash cable spectrum group 1 frequency 40000000 cable spectrum group 1 frequency 20000000 2 cable modulation profile 3 request 0 16 1 8 16qam scrambler 152 no diff 128 fixed uw16 cable modulation profile 3 initial 5 34 0 48 16qam scrambler 152 no diff 256 fixed uw16 cable modulation profile 3 sta...

Страница 284: ...twork 10 0 0 0 ip classless no ip http server line con 0 password cisco login transport input none line aux 0 line vty 0 4 password cisco login end The command lines in the sample configuration file beginning with the string cable spectrum group contain the critical elements necessary to set up spectrum management in your overall configuration cable spectrum group 1 frequency 40000000 cable spectr...

Страница 285: ...e modulation profile configured in the sample cable upstream 0 spectrum group 1 cable upstream 0 modulation profile 3 This section provides a Cisco Release 12 0 8 SC sample configuration file showing roughly the same capabilities as in the Cisco IOS Release 12 0 5 T image version 12 0 service timestamps debug uptime service timestamps log uptime service password encryption hostname newtown01 7246 ...

Страница 286: ...unnyvale 12 17 cable upstream 4 power level 0 no cable upstream 4 shutdown cable upstream 5 description Sunnyvale 18 23 cable upstream 5 power level 0 no cable upstream 5 shutdown interface Cable4 0 description Santa Clara CA ip address 207 252 148 1 255 255 255 0 secondary ip address 10 9 0 1 255 255 0 0 no ip directed broadcast no ip mroute cache no keepalive cable spectrum group 1 cable dhcp gi...

Страница 287: ...o cable upstream 3 shutdown cable upstream 4 description Evergreen 1 8 cable upstream 4 power level 0 no cable upstream 4 shutdown able upstream 5 description Evergreen 9 17 cable upstream 5 power level 0 no cable upstream 5 shutdown interface Cable6 0 description Morgan Hill CA ip address 209 187 214 1 255 255 255 0 secondary ip address 10 11 0 1 255 255 0 0 no ip directed broadcast no ip mroute ...

Страница 288: ...t0 0 prefer end Baseline Privacy Interface Example The Cisco uBR7200 series supports 56 bit and 40 bit encryption decryption 56 bit is the default After you choose a CMTS image that supports BPI BPI is enabled by default for the Cisco uBR7200 series Key commands that appear in the Cisco uBR7200 series configuration file that denote encryption decryption is supported include int cable 2 0 cable pri...

Страница 289: ... is generated and returned masks the first 16 bits of the 56 bit key to zero in software To return to 56 bit encryption decryption after changing to 40 bit enter the no command preceding the 40 bit des option Caution Cisco uBR7200 series telco return images that support BPI do not support encryption decryption in the telco return path Euro DOCSIS Operation Example The Cisco uBR7200 series supports...

Страница 290: ...on profile 2 initial 5 34 0 48 qpsk scrambler 152 no diff 128 fixed uw16 cable modulation profile 2 station 5 34 0 48 qpsk scrambler 152 no diff 128 fixed uw16 cable modulation profile 2 short 5 75 6 8 qpsk scrambler 152 no diff 72 fixed uw8 cable modulation profile 2 long 8 220 0 8 qpsk scrambler 152 no diff 80 fixed uw8 no cable qos permission create no cable qos permission update cable qos perm...

Страница 291: ...255 255 1 8 0 1 snmp server engineID local 00000009020000D0BA1EED00 snmp server community public RO snmp server community private RW alias exec scm show cable modem line con 0 exec timeout 0 0 transport input none line aux 0 line vty 0 4 password lab login end Virtual Private Network VPN Example VPN features let MSOs and ISPs offer private network connections to telecommuters and other business or...

Страница 292: ...ion 64qam cable downstream interleave depth 32 cable upstream 0 power level 0 no cable upstream 0 shutdown While configuring the physical interface IP address and IP helper address parameters must not be entered interface c3 0 1 ip address 172 100 1 1 255 255 255 0 cable helper address 11 0 0 2 ip policy route map customer1 no ip directed broadcast no cable proxy arp no cable ip multicast echo int...

Страница 293: ...se set ip default next hop a b c d This works with CEF and process switching not with cache based fast switching The packets are first routed normally using the routing table If a route is not found then they are forwarded to a b c d which is the IP address at the other end of the tunnel Configuration for Router 1 interface ethernet0 ip address 172 100 2 1 255 255 255 0 interface serial 0 ip addre...

Страница 294: ... product Following is a sample voice over IP configuration file for the Cisco uBR7246 version 12 0 no service pad service timestamps debug uptime service timestamps log uptime no service password encryption hostname twoslot enable password ip subnet zero no ip domain lookup ip host abrick 223 255 254 254 ip host muck 255 255 255 255 ip host keyer 223 255 254 254 ip host bell 223 255 254 253 interf...

Страница 295: ...out 0 0 transport input none line aux 0 line vty 0 4 login line vty 5 11 login end Clock Support Example Clock support enables the Cisco uBR7246 VXR router to synchronize to an external timing reference and distribute clock to Cisco MC16S and MC16E cable interface line cards The synchronized DOCSIS time stamps are then passed downstream to all CMs Note Clock support is designed for cable networks ...

Страница 296: ...turn cable modems cannot receive traffic over the same downstream channel as cable modems operating on a two way data system In these instances segment your cable plant to allow more than one downstream channel The following elements must be configured for a telco return network Authentication authorization and accounting configuration as well as specific RADIUS dial server information Telco retur...

Страница 297: ...able upstream 1 shutdown cable upstream 2 shutdown cable upstream 3 shutdown cable upstream 4 shutdown cable upstream 5 shutdown interface Cable6 0 ip address 172 16 1 1 secondary ip address 10 1 1 1 no ip directed broadcast cable helper address 24 1 1 84 no keepalive cable downstream annex B cable downstream modulation 64qam cable downstream interleave depth 32 cable downstream frequency 68700000...

Страница 298: ...lt start stop radius The command lines in the sample configuration file beginning with the string cable telco return contain the critical elements to minimally set up the telco return network cable telco return enable cable telco return spd 1 factory default cable telco return spd 1 dhcp authenticate cable telco return spd 1 dhcp server 24 1 1 84 cable telco return spd 1 ppp authenticate chap cabl...

Страница 299: ...ample configuration file beginning with the string radius server contain the critical elements for minimal RADIUS dial server setup radius server host 24 1 1 78 auth port 1645 acct port 1646 radius server key radius_server_key Note For more detailed information regarding AAA telco return SNMP server and RADIUS dial server software functionality you can access Cisco IOS software configuration docum...

Страница 300: ...C 18 Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide OL 2239 03 Appendix C Viewing Sample Configuration Files ...

Страница 301: ...r T 7 5 75 11 75 7 10 58 11 5 T 8 11 75 17 75 13 16 58 17 5 T9 17 75 23 75 19 22 58 23 5 T10 23 75 29 75 25 28 58 29 5 T11 29 75 35 75 31 34 58 35 5 T12 35 75 41 75 37 40 58 41 5 T13 41 75 47 75 43 46 58 47 5 TV IF 40 0 46 0 45 75 42 17 41 25 2 2 54 0 60 0 55 25 58 83 59 75 3 3 60 0 66 0 61 25 64 83 65 75 4 4 66 0 72 0 67 25 70 83 71 75 5 5 76 0 82 0 77 25 80 83 81 75 6 6 82 0 88 0 83 25 86 83 87 ...

Страница 302: ... 25 228 0 234 0 229 25 232 83 233 75 M 26 234 0 240 0 235 25 238 83 239 75 N 27 240 0 246 0 241 25 244 83 245 75 O 28 246 0 252 0 247 25 250 83 251 75 P 29 252 0 258 0 253 25 256 83 257 75 Q 30 258 0 264 0 259 25 262 83 263 75 R 31 264 0 270 0 265 25 268 83 269 75 S 32 270 0 276 0 271 25 274 83 275 75 T 33 276 0 282 0 277 25 280 83 281 75 U 34 282 0 288 0 283 25 286 83 287 75 V 35 288 0 294 0 289 ...

Страница 303: ...0 450 0 445 25 448 83 449 75 ZZ 62 450 0 456 0 451 25 454 83 455 75 AAA 63 456 0 462 0 457 25 460 83 461 75 BBB 64 462 0 468 0 463 25 466 83 467 75 CCC 65 468 0 474 0 469 25 472 83 473 75 DDD 66 474 0 480 0 475 25 478 83 479 75 EEE 67 480 0 486 0 481 25 484 83 485 75 FFF 68 486 0 492 0 487 25 490 83 491 75 GGG 69 492 0 498 0 493 25 496 83 497 75 HHH 70 498 0 504 0 499 25 502 83 503 75 III 71 504 0...

Страница 304: ...6 0 661 25 664 83 665 75 103 103 666 0 672 0 667 25 670 83 671 75 104 104 672 0 678 0 673 25 676 83 677 75 105 105 678 0 684 0 679 25 682 83 683 75 106 106 684 0 690 0 685 25 688 83 689 75 107 107 690 0 696 0 691 25 694 83 695 75 108 108 696 0 702 0 697 25 700 83 701 75 109 109 702 0 708 0 703 25 706 83 707 75 110 110 708 0 714 0 709 25 712 83 713 75 111 111 714 0 720 0 715 25 718 83 719 75 112 11...

Страница 305: ...876 0 882 0 877 25 880 83 881 75 139 139 882 0 888 0 883 25 886 83 887 75 140 140 888 0 894 0 889 25 892 83 893 75 141 141 894 0 900 0 895 25 898 83 899 75 142 142 900 0 906 0 901 25 904 83 905 75 143 143 906 0 912 0 907 25 910 83 911 75 144 144 912 0 918 0 913 25 916 83 917 75 145 145 918 0 924 0 919 25 922 83 923 75 146 146 924 0 930 0 925 25 928 83 929 75 147 147 930 0 936 0 931 25 934 83 935 7...

Страница 306: ...153 147 25 147 25 S8 153 160 154 25 154 25 S9 160 167 161 25 161 25 S10 167 174 168 25 168 25 5 174 181 175 25 175 25 6 181 188 182 25 182 25 7 188 195 189 25 189 25 8 195 202 196 25 196 25 9 202 209 203 25 203 25 10 209 216 210 25 210 25 11 216 223 217 25 217 25 12 223 230 224 25 224 25 S11 230 237 231 25 231 25 S12 237 244 238 25 238 25 S13 244 251 245 25 245 25 S14 251 258 252 25 252 25 S15 258...

Страница 307: ...25 22 478 486 479 25 479 25 23 486 494 487 25 487 25 24 494 502 495 25 495 25 25 502 510 503 25 503 25 26 510 518 511 25 511 25 27 518 526 519 25 519 25 28 526 534 527 25 527 25 29 534 542 535 25 535 25 30 542 550 543 25 543 25 31 550 558 551 25 551 25 32 558 566 559 25 559 25 33 566 574 567 25 567 25 34 574 582 575 25 575 25 35 582 590 583 25 583 25 36 590 598 591 25 591 25 37 598 606 599 25 599 ...

Страница 308: ...5 719 25 53 726 734 727 25 727 25 54 734 742 735 25 735 25 55 742 750 743 25 743 25 56 750 758 751 25 751 25 57 758 766 759 25 759 25 58 766 774 767 25 767 25 59 774 782 775 25 775 25 60 782 790 783 25 783 25 61 790 798 791 25 791 25 62 798 806 799 25 799 25 63 806 814 807 25 807 25 64 814 822 815 25 815 25 65 822 830 823 25 823 25 66 830 838 831 25 831 25 67 838 846 839 25 839 25 68 846 854 847 2...

Страница 309: ...guration register information contained in this appendix to do the following Set and display the configuration register value Force the system into the bootstrap program Select a boot source and default boot filename Enable or disable the Break function Control broadcast addresses Set the console terminal baud rate Load operating software from ROM Enable booting from a Trivial File Transfer Protoc...

Страница 310: ...mands in the configuration file the router attempts to boot the first file in system Flash memory If no file is found in system Flash memory the router attempts to netboot a default file with a name derived from the value of the boot field for example cisco2 7200 If the netboot attempt fails the boot helper image in boot flash memory will boot up If boot commands are in the configuration file the ...

Страница 311: ...e system software to ignore nonvolatile random access memory NVRAM contents Bit 7 Bit 7 enables the OEM bit It disables the bootstrap messages at startup Bit 8 Bit 8 controls the console Break key Setting bit 8 the factory default causes the processor to ignore the console Break key Clearing bit 8 causes the processor to interpret Break as a command to force the system into the bootstrap monitor h...

Страница 312: ...he ROM Monitor on the Cisco CMTS in the Cisco Broadband Cable Command Reference Guide http www cisco com en US docs ios cable command reference cbl_book html Bit 11 and Bit 12 Bit 11 and Bit 12 in the configuration register determine the baud rate of the console terminal Table E 5 shows the bit settings for the four available baud rates The factory set default baud rate is 9600 Note The console li...

Страница 313: ...hardware command The following example illustrates output from the show version command for a Cisco uBR7246 VXR router with the cable clock card installed Router show version Cisco Internetwork Operating System Software IOS tm 7200 Software UBR7200 P M Version 12 1 10 EC RELEASE SOFTWARE TAC Support http www cisco com tac Copyright c 1986 2000 by cisco Systems Inc Compiled Wed 02 Feb 00 16 49 by c...

Страница 314: ...P broadcasts with ones 09 Do not use secondary bootstrap 08 Break disabled 07 OEM disabled 06 Ignore configuration disabled 05 Fast boot disabled 04 Fan boot disabled 03 00 Boot to ROM monitor If the prompt is rommon1 the confreg command displays the virtual configuration register currently in effect It includes a description of the bits See the following sample output rommon 1 confreg Configurati...

Страница 315: ...ary enabled are load rom after netboot fails console baud 9600 boot the ROM Monitor do you wish to change the configuration y n n y enable diagnostic mode y n n n enable use net in IP bcast address y n n n disable use rom after netboot fails y n n n enable use all zero broadcast y n n n enable break abort has effect y n n n enable ignore system config info y n n n change console baud rate y n n n ...

Страница 316: ... VXR Installation and Configuration Guide OL 5013 02 Appendix E Configuration Register Information for the Cisco uBR7200 Series Universal Broadband Routers Setting the Configuration Register While Running ROM Monitor ...

Страница 317: ...nd 8 11 downstream requests 3 2 3 3 host to host communication activating Proxy ARP 3 28 AutoInstall facility overview 1 31 Autoinstall facility configuring Cisco uBR7200 series with 2 10 B backoff values upstream 3 19 3 20 bandwidth management 1 33 Baseline Privacy Interface BPI BPI network example 4 2 CM communication with 4 3 configuration files 2 29 debug cable keyman command 8 12 debug cable ...

Страница 318: ...file 1 121 cable upstream power adjust 3 16 8 7 cable upstream power level 3 24 cable upstream range backoff 1 141 cable upstream rate limit 3 18 cable upstream rate limit token bucket 3 26 cable upstream scrambler 3 17 cable upstream time adjust 3 17 cable interface configuring 3 1 downstream configuring 3 2 Setup facility 1 31 upstream configuring 3 11 3 22 cable interface line card logical inte...

Страница 319: ...1 74 copy commands copy rcp flash A 2 A 4 copy running config startup config 2 9 2 11 2 13 2 29 copy running config tftp 2 15 copy running start 1 16 copy slot A 4 copy tftp flash A 2 A 4 counters clearing cable modem 5 5 D Data Encryption Standard DES changing default 2 30 debug commands debug cable arp command 8 11 debug cable error command 3 33 debug cable keyman 8 12 debug cable phs command 3 ...

Страница 320: ...1 1 97 DSG 1 2 1 99 DSX Messages and Synchronized PHS Information 1 69 dynamic backoff algorithm 5 7 Dynamic Channel Change DCC for Loadbalancing 1 89 dynamic contention algorithms 5 6 dynamic map advance algorithm 5 7 dynamic ranging 3 19 Dynamic SID VRF Mapping Support 1 126 E Easy IP phase 1 1 83 echo IP broadcast and IP multicast 1 79 EEPROM MAC address bank 1 17 examples Internet access C 1 C...

Страница 321: ... 3 34 Network Address Translation NAT 1 84 setting routing protocols for 2 20 IPv6 over L2VPN 1 127 K key encryption key KEK 2 30 M MAC Media Access Control configuring PHS 3 33 Management Information Base MIB Changes and Enhancements 1 91 minislot 3 25 modem see cable modem modulation downstream 3 8 MPEG downstream framing format 3 9 3 10 multicast echo 3 33 3 34 multicast options 1 96 Multilink ...

Страница 322: ...nhancements prior to DOCSIS 1 1 1 52 R rate limiting downstream 3 10 upstream 3 26 3 27 reboot router 2 9 registration timeout 5 6 RIP Routing Information Protocol 2 20 RTP Header Compression 1 46 S sample configuration files 2 29 C 1 scrambler activating 3 17 security features 1 102 replacing or recovering a lost password 2 6 setting password protection 2 5 Service Independent Intercept 1 78 Setu...

Страница 323: ...ap list 1 123 downstream frequency 1 123 downstream signals 8 6 fast fault detection 1 123 static CPE 1 123 upstream rate limiting 3 27 Turbo ACL Access Control Lists 1 108 Type Length Value Parser and Encoder 1 63 U upstream admission control 3 12 3 13 backoff values 3 19 3 20 cable interface 3 11 3 22 channel width configuring 3 21 differential encoding 3 13 3 14 FEC forward error correction 3 1...

Страница 324: ...Index IN 8 Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide OL 2239 02 ...

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