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6-12

Cisco uBR10012 Universal Broadband Router Software Configuration Guide

OL-1520-05

Chapter 6      Troubleshooting the System

Using a Headend CM to Verify Downstream Signals

Using a Headend CM to Verify Downstream Signals

You can use a Cisco uBR924 cable access modem to verify the downstream signal originating from a 
Cisco uBR10012 router. Be sure that you configure the Cisco uBR924 according to DOCSIS CM 
practices. 

To verify the downstream signal from a Cisco uBR10012 router using a Cisco uBR924, follow the 
procedure below:

Step 1

After the Cisco uBR924 is operational and you have an input signal between 0 and +5 dBmV, use the 

show controller c0 tuner

 command.

Step 2

Scan the output for the value corresponding to the signal-to-noise (SNR) estimate variable. If this value 
is at least 35 dB, you have an optimized signal. If the value is less than 34 dB, adjust the upconverter at 
the cable headend.

Tip

The SNR estimate for a CM installed at a headend should be between 35 and 39 dB. Although 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.

Performing Amplitude Averaging

The Cisco uBR10012 router 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. To avoid 
dropping flapping CMs, the Cisco uBR10012 router averages a configurable number of RNG-REQ 
messages before it makes power adjustments. By compensating for a potentially unstable return path, 
the Cisco uBR10012 router maintains connectivity with affected CMs. You can interpret these power 
adjustments, however, as indicating unstable return path connections.

The 

show cable flap-list

 and 

show cable modem

 commands are expanded to indicate the paths on which 

the Cisco uBR10012 router is making power adjustments and the modems that have reached maximum 
transmit power settings. These conditions indicate unstable paths that should be serviced.

The following example shows the output of the 

show cable flap-list

 command:

Router# 

show cable flap-list

MAC Address     Upstream     Ins   Hit   Miss  CRC   P-Adj Flap  Time

 0010.7bb3.fd19  Cable5/0/0/U1  0     2792  281   0    *45    58    Jul 27 16:54:50

 0010.7bb3.fcfc  Cable5/0/0/U1  0     19    4     0    !43    43    Jul 27 16:55:01

 0010.7bb3.fcdd  Cable5/0/0/U1  0     19    4     0    *3     3     Jul 27 16:55:01

The asterisk (*) indicates that the CMTS is using the power-adjustment method on this modem. An 
exclamation point (!) indicates that the modem has reached maximum transmit power.

Содержание Universal Broadband Router Cisco uBR10012

Страница 1: ...rive San Jose CA 95134 1706 USA http www cisco com Tel 408 526 4000 800 553 NETS 6387 Fax 408 527 0883 Cisco uBR10012 Universal Broadband Router Software Configuration Guide Cisco IOS Software 12 3 BC 12 2 BC 12 2 CY November 2006 Text Part Number OL 1520 08 ...

Страница 2: ...s go to this URL www cisco com go trademarks Third party trademarks mentioned are the property of their respective owners The use of the word partner does not imply a partnership relationship between Cisco and any other company 1110R Cisco uBR10012 Universal Broadband Router Software Configuration Guide Copyright 2005 2009 Cisco Systems Inc All rights reserved ...

Страница 3: ... 1 Overview of Cisco uBR10012 Universal Broadband Router Software 1 1 Cisco IOS Releases and Images for the Cisco uBR10012 Router 1 2 Operational Overview 1 2 Cisco IOS Software Location 1 2 Determining Your Cisco IOS Software Release 1 2 Upgrading to a New Software Release 1 3 12 3 BC Release Train and Images 1 3 12 2 BC Release Train and Images 1 3 12 2 CY Release Train and Images 1 4 Cisco uBR1...

Страница 4: ...and the Enable Passwords 2 3 Configuring the Cisco uBR10012 Router Using AutoInstall 2 7 Preparing for the AutoInstall Process 2 7 Configuring the Cisco uBR10012 Router Using the Setup Facility 2 8 Configuring Global Parameters 2 8 Configuring Upstream Frequencies 2 11 Configuring the Cisco uBR10012 Router Manually Using Configuration Mode 2 13 Configuring the Cable Interface with the Extended Set...

Страница 5: ...ng the Upstream Frequency 3 20 Setting the Upstream Input Power Level 3 22 Specifying Upstream Minislot Size 3 23 Setting Upstream Rate Limiting and Traffic Shaping 3 24 Configuring Optional Cable Interface Features 3 26 Activating Host to Host Communication Proxy ARP 3 26 Activating Packet Intercept Capabilities 3 27 Configuring Payload Header Suppression and Restoration 3 27 Setting Optional Bro...

Страница 6: ...ignals 6 15 Configuring Unmodulated Test Signals 6 15 Configuring PRBS Test Signals 6 15 Verifying Test Signal Output 6 15 Pinging Unresponsive CMs 6 16 Pinging a CM 6 16 Verifying the Ping 6 16 Using Cable Interface debug Commands 6 17 debug cable arp 6 17 debug cable error for MAC Protocol Errors 6 17 debug cable keyman for Baseline Privacy Activity 6 17 debug cable mac messages 6 17 debug cable...

Страница 7: ...stream Signals A 4 Overview of DOCSIS Two Way Server Requirements A 5 CMTS Traffic Engineering A 5 A P P E N D I X B Configuration Register Information for the Cisco uBR10012 Universal Broadband Router B 9 Configuration Bit Meanings B 9 Bits 0 3 B 10 Bit 6 B 11 Bit 7 B 11 Bit 8 B 12 Bit 10 and Bit 14 B 12 Bit 11 and Bit 12 B 12 Bit 13 B 13 Bit 15 B 13 Displaying the Configuration Register While Ru...

Страница 8: ...Contents 8 Cisco uBR10012 Universal Broadband Router Software Configuration Guide OL 1520 06 ...

Страница 9: ...ry to configure maintain and troubleshoot the initial software configuration for the Cisco uBR10012 universal broadband router This guide also directs you to other closely related documentation for additional features and optimization The Cisco uBR10000 series CMTS solutions allow cable companies Internet service providers ISPs and others to allocate channel capacity for Internet access services u...

Страница 10: ...d networking Document Organization This guide focuses on configuration of Cisco IOS software for the Cisco uBR10012 router Table 2 summarizes the chapters and procedures in this guide These chapters are presented in the general sequence used in a router installation and configuration However this sequence is also affected by your network configuration and other factors Table 2 Guide Contents and O...

Страница 11: ...entions Convention Description boldface font Commands and keywords are in boldface italic font Arguments for which you supply values are in italics Elements in square brackets are optional x y z Alternative mutually exclusive keywords are grouped in braces and separated by vertical bars x y z Optional alternative keywords are grouped in brackets and separated by vertical bars string A nonquoted se...

Страница 12: ...orking Terms and Acronyms guide on Cisco com and the Documentation CD ROM ABR available bit rate ACL access control list AGC automatic gain control ASIC application specific integrated circuit AWG American wire gauge BGP Border Gateway Protocol BPI Baseline Privacy Interface CM cable modem CPE side device in a cable network CMTS cable modem termination system CoS class of service CPE customer prem...

Страница 13: ...upstream and one or more downstream cable ports MAC Media Access Control MAP upstream bandwidth allocation map MB megabyte Mbps Mega bits per second MM multimode Modem modulator demodulator MPLS Multiprotocol label switching nrt VBR non real time variable bit rate NTSC National Television Standards Committee NVRAM nonvolatile random access memory OAM AIS Operation Administration and Maintenance al...

Страница 14: ...internet backbone is considered to be moving in the upstream direction Also data flowing from the CM towards the CMTS is moving in the upstream direction UTP unshielded twisted pair VC virtual circuit VPN Virtual Private Network Additional References The following references provide additional information related to the Cisco uBR10012 router Related Topic Document Title Documentation Roadmap Cisco...

Страница 15: ... Additional Cable Broadband Information Resources Cisco Cable Broadband Software Center Web page http www cisco com en US products sw netmgtsw ps529 prod_software_versions_co mparison html Cisco Cable Broadband Technical Support Web page http www cisco com cisco web support index html Cisco Multiservice Broadband Cable Guide http www cisco com en US prod collateral video ps8806 ps5684 ps2209 prod_...

Страница 16: ...rting SNMPv1 or SNMPv2 network management The SNMP MIBs improve object support for SNMP traps This aids in network management Traps are the mechanisms used to automatically send alarms for certain network events Deprecated MIBs Supported in earlier releases of Cisco IOS software but have been replaced by more standardized scalable MIBs Network Management applications and scripts should convert to ...

Страница 17: ...26 7208 or elsewhere in North America by calling 800 553 NETS 6387 Documentation Feedback If you are reading Cisco product documentation on Cisco com you can submit technical comments electronically Click the Fax or Email option under the Leave Feedback at the bottom of the Cisco Documentation home page You can e mail your comments to bug doc cisco com To submit your comments by mail use the respo...

Страница 18: ...tion or assistance concerning Cisco product capabilities product installation or basic product configuration Priority level 3 P3 Your network performance is degraded Network functionality is noticeably impaired but most business operations continue Priority level 2 P2 Your production network is severely degraded affecting significant aspects of business operations No workaround is available Priori...

Страница 19: ... are classified as priority level 1 or priority level 2 these classifications are assigned when severe network degradation significantly impacts business operations When you contact the TAC Escalation Center with a P1 or P2 problem a Cisco TAC engineer will automatically open a case To obtain a directory of toll free Cisco TAC telephone numbers for your country go to the following URL http www cis...

Страница 20: ...20 Cisco uBR10012 Universal Broadband Router Software Configuration Guide OL 1520 06 Preface Obtaining Technical Assistance ...

Страница 21: ... Cisco IOS Releases and Images for the Cisco uBR10012 Router page 1 2 Describes the supported Cisco IOS release trains associated features and latest Cisco IOS images for each recently 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 uBR10012 Univ...

Страница 22: ...ash memory device when you save the configuration Each line card also contains onboard Flash memory that is used to store a boot loader similar in function to that used on the PRE1 module However the line card loader executes following a system reset line card reset or line card insertion to reload and execute any code that must run on the line card for it to operate properly Software images may a...

Страница 23: ...ocumentation Table 1 1 displays the memory recommendations of the Cisco IOS feature sets for the Cisco uBR10012 universal broadband router for Cisco IOS Release 12 3 9a BC 12 2 BC Release Train and Images The 12 2 BC train is an interim release train that provides DOCSIS 1 1 two way support along with support for selected new features Cisco IOS Release 12 2 4 BC1b provides a migration path from th...

Страница 24: ...atures Cisco IOS Release 12 2 11 BC1b provides a migration path from the earlier 12 2 XF releases The Cisco IOS 12 2 CY release train provides the following additional software features PBR support for Cisco uBR10012 VLAN support for Cisco uBR10012 Note Cisco IOS Release 12 2 11 CY does not include support for telco return images Table 1 2 displays the memory recommendations of the Cisco IOS featu...

Страница 25: ...phony solutions Note This guide focuses on Cisco uBR10012 router software and related hardware For detailed descriptions of the Cisco uBR10012 router chassis and components refer to these resources Cisco uBR10012 Universal Broadband Router Hardware Installation Guide Cisco uBR10012 Field Replaceable Units FRUs web page on Cisco com The Cisco uBR10012 router chassis is designed for front and rear a...

Страница 26: ...edundant configuration each TCC card also provides a connector for an external clock reference source with a second connector for a backup clock source Figure 1 1 shows the slot numbering for the front view components of a fully loaded Cisco uBR10012 router with the corresponding slot numbering without bezel Figure 1 1 Cisco uBR10012 Router Slot Numbering Front View without bezel FastEthernet slot...

Страница 27: ...S 3 U S 2 U S 0 U S 1 U S 2 U S 3 D S 0 uBR MC28C EN AB LE D U S 1 D S 1 U S 0 U S 3 U S 2 U S 0 U S 1 U S 2 U S 3 D S 0 uBR MC28C EN AB LE D U S 1 D S 1 U S 0 U S 3 U S 2 U S 0 U S 1 U S 2 U S 3 D S 0 uBR MC28C EN AB LE D U S 1 D S 1 U S 0 U S 3 U S 2 U S 0 U S 1 U S 2 U S 3 D S 0 uBR MC28C EN AB LE D U S 1 D S 1 U S 0 U S 3 U S 2 U S 0 U S 1 U S 2 U S 3 D S 0 uBR MC28C EN AB LE D U S 1 D S 1 U S...

Страница 28: ...our line cards with any combination of the following WAN choices Cisco uBR10 SRP OC12SML DPT WAN Line Card for the Cisco uBR10012 Router Cisco uBR10012 OC 48 DPT POS interface module Cisco uBR10 1GE Gigabit Ethernet GigE uplink line card Cisco uBR10 1OC12 P SMI OC 12 POS uplink line card Cisco uBR10 SRP OC12SML Dynamic Packet Transport DPT WAN card Timing Communication and Control Plus TCC card Th...

Страница 29: ...ficient power for a fully configured chassis so that if one AC PEM fails the other automatically begins providing power for the entire router without impacting system operations The AC PEMs use standard 200 240 VAC 50 60 Hz input power obtained through power receptacles on the front panel of each PEM The two AC PEMs convert the AC power to provide filtered redundant and load shared DC power to the...

Страница 30: ...leases Extended Setup Facility 12 2 1 XF1 and later 12 2 XF 12 2 BC and 12 3 BC releases Cisco IOS Release 12 3 BC Command line Enhancements Cisco IOS Release 12 3 9a BC Command Line Interface CLI Enhancements 12 3 9a BC and later 12 3 BC releases DHCP Servers and Feature Support DHCP MAC Address Exclusion List for cable source verify dhcp Command Cisco IOS Release 12 3 13a BC and later 12 3 BC re...

Страница 31: ...2 2 BC and 12 3 BC releases DOCSIS 1 1 Payload Header Suppression and Restoration 12 2 1 XF1 and later 12 2 XF 12 2 BC and 12 3 BC releases DOCSIS 1 1 Quality of Service Support 12 2 1 XF1 and later 12 2 XF 12 2 BC and 12 3 BC releases DOCSIS 1 1 Rate Limiting and Traffic Shaping 12 2 1 XF1 and later 12 2 XF 12 2 BC and 12 3 BC releases DOCSIS 1 1 Service Flow Manager 12 2 1 XF1 and later 12 2 XF ...

Страница 32: ...eleases PXF ARP Filter 12 3 17a BC and later 12 3 BC releases PXF Divert Rate Limiting 12 3 17a BC and later 12 3 BC releases Service Independent Intercept SII Support 12 3 13a BC and later 12 3 BC releases IP Broadcast and Multicast Features IP Broadcast Echo 12 2 1 XF1 and later 12 2 XF 12 2 BC and 12 3 BC releases IP Multicast Echo 12 2 1 XF1 and later 12 2 XF 12 2 BC and 12 3 BC releases Multi...

Страница 33: ...BC and 12 3 BC releases EtherChannel Support on the Cisco uBR10012 Universal Broadband Router 12 3 9a BC and later 12 3 BC releases Management Information Base MIB Changes and Enhancements 12 3 17a BC and later 12 3 BC releases MIBs Changes and Updates in Cisco IOS Release 12 3 9a BC 12 3 9a BC and later 12 3 BC releases Pre equalization Control for Cable Modems 12 3 17a BC and later 12 3 BC relea...

Страница 34: ... BC releases Flap List Support 12 2 1 XF1 and later 12 2 XF 12 2 BC and 12 3 BC releases Online Offline Diagnostics OOD Support for the Cisco uBR10012 Universal Broadband Router 12 3 13a BC and later 12 3 BC releases Virtual Interfaces Virtual Interface and Frequency Stacking Support on the Cisco uBR10 MC5X20S U BPE 12 3 9a BC and later 12 3 BC releases Virtual Interface Support for HCCP N 1 Redun...

Страница 35: ...ormation refer to the Configuring the Cisco uBR10012 Router Manually Using Configuration Mode section on page 2 13 Cisco Network Registrar Cisco provides the Cisco Network Registrar with each Cisco uBR10012 router Cisco Network Registrar dramatically improves the reliability of naming and addressing services for enterprise and service provider networks Cisco Network Registrar provides scalable Dom...

Страница 36: ...mands for the Cisco uBR10012 router cable arp filter See Cable ARP Filter Enhancement cable logging layer2events cable source verify show cable tech support show controllers cable show tech support For additional information about these command changes refer to these resources Cisco Broadband Cable Command Reference Guide http www cisco com en US docs ios cable command reference cbl_book html DHCP...

Страница 37: ...ted status and subjects all packets to standard source verification checks on the Cisco CMTS Note When the cable source verify dhcp feature is enabled and a statically defined IP address has been added to the CMTS for a CM using the cable trust command to override the cable source verify dhcp checks for this device packets from this CM will continue to be dropped until an entry for this CM is adde...

Страница 38: ...roadband Router Software Configuration Guide OL 1520 05 Chapter 1 Overview of Cisco uBR10012 Universal Broadband Router Software Supported Software Features for the Cisco uBR10012 Router Termination System Feature Guide on Cisco com ...

Страница 39: ...orts these extensions solicits services using dynamic MAC messages If the CMs in your network are all DOCSIS 1 0 based they receive regular DOCSIS 1 0 treatment from the CMTS DOCSIS 1 0 Baseline Privacy Interface The Cisco uBR10012 router supports full DOCSIS 1 0 Baseline Privacy Interface BPI specifications The BPI for DOCSIS 1 0 protects user data privacy across the shared medium cable network a...

Страница 40: ...atenation is otherwise supported for the upstream channel DOCSIS 1 0 concatenation allows the cable modem to make a single time slice request for 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 relea...

Страница 41: ...OCSIS 1 0 Quality of Service Support Cisco uBR10012 router software offers DOCSIS 1 0 Quality of Service QoS support This allows you to define service levels in order to map data packets efficiently into traffic classes These traffic classes determine how network resources are allocated and controlled QoS can be delivered through a combined use of IP precedence ToS bits and QoS capabilities of IP ...

Страница 42: ... priority packets thereby degrading quality IP precedence bits can be used as a basic differentiator to provide independent rate limits for different traffic streams DOCSIS 1 0 Downstream Signal Test Commands The cable downstream if output command provides several test capabilities and is enhanced with the following options to generate test signals on the downstream interface cable downstream if o...

Страница 43: ...eliable operation with higher priority traffic requires multiple SIDs at least two per cable interface to separate highest priority traffic from data traffic In DOCSIS 1 0 SIDs are set up statically When supporting extensions to DOCSIS 1 0 or DOCSIS 1 1 SIDs can be set up either statically or dynamically Both the CMTS and CM must support the feature set DOCSIS 1 0 QoS Profile Enforcement QoS profi...

Страница 44: ...nstream rate limiting Allows downstream grants to rate exceeding CMs to be buffered without incurring TCP related timeouts and retransmits Downstream rate shaping enables you to partition downstream traffic for a CM into multiple classes of service and multiple data rates by using the three precedence bits in the ToS byte in the IP header to specify a class of service assignment for each packet Th...

Страница 45: ...service types are presented each requiring a static QoS profile in order to perform ToS overwrite The Default DOCSIS 1 0 ToS Overwrite feature eliminates the need to create multiple QoS profiles in order to perform type of service ToS overwrite by automatically bounding all DOCSIS 1 0 Cable Modem CM created profiles to a default ToS overwrite Enhanced Rate Bandwidth Allocation ERBA Support for DOC...

Страница 46: ...ems 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 use the cable qos promax ds burst command in global configuration mode To remove this ERBA setting from the QoS profile use the no form of this command cable qos pro max ...

Страница 47: ...d illustrates that the maximum downstream burst has been defined and is a management created QoS profile Router show cable qos pro ID Prio Max Guarantee Max Max TOS TOS Create B IP prec upstream upstream downstream tx mask value by priv rate bandwidth bandwidth bandwidth burst enab enab 1 0 0 0 0 0 0xFF 0x0 cmts r no no 2 0 64000 0 1000000 0 0xFF 0x0 cmts r no no 3 7 31200 31200 0 0 0xFF 0x0 cmts ...

Страница 48: ...iles for illustration In this scenario both QoS profiles are identical except for the max ds burst size which is set to 5000 in QoS profile 101 and 5000 in QoS profile 102 Optimal Settings for DOCSIS 1 0 Downstream Powerburst DOCSIS allows the setting different token bucket parameters for each service flow including the token bucket burst size When burst sizes are closer to 0 QoS is enforced in a ...

Страница 49: ...lity to provide separate downstream rates for any given CM based on the IP precedence value in the packet This helps separate voice signaling and data traffic that goes to the same ITCM to address rate shaping purposes Concatenation allows a CM to send several packets in one large burst instead of having to make a separate grant request for each Caution All DOCSIS 1 0 extensions are available only...

Страница 50: ...rface Plus Features DOCSIS 1 1 enhances the DOCSIS 1 0 BPI security features with BPI which includes the following features 1024 bit public key with Pkcs 1 Version 2 0 encryption Commands to configure source IP filtering on RF subnets to prevent subscribers from using source IP addresses that are not valid Digital certificates that provide secure user identification and authentication Filtering IP...

Страница 51: ...mpiled command to enable the Turbo ACL feature To display access lists use the show access lists command without specifying the compiled option For complete information about access lists see the Traffic Filtering and Firewall volume in the Cisco IOS Release 12 1 Security Configuration Guide at the following URL http www cisco com en US docs ios 12_1 security configuration guide scdacls html Authe...

Страница 52: ...oad the Cisco CMTS with the reload or restart command The Cisco uBR10 MC5X20S U Broadband Processing Engine BPE supports both North American and European root certificates at the same time and simultaneous root certificate support is a requirement in this case DOCSIS 1 1 CM Compatibility DOCSIS 1 1 CMs can coexist with DOCSIS 1 0 and 1 0 CMs in the same network the Cisco uBR10012 router provides t...

Страница 53: ...ases Per SID counters have now been added in Cisco IOS Release 12 2XF for debugging concatenation activity Also see the DOCSIS 1 0 Concatenation Override section on page 1 20 The combination of multiple upstream packets into one packet reduces packet overhead and overall latency and increases transmission efficiency Using concatenation a CM needs to make only one bandwidth request for a concatenat...

Страница 54: ...ents of higher layer create modify and teardown messages The DSX state machine module on the CMTS manages the several concurrent dynamic service transactions between CMs and the CMTS It include state machine support for all 3 DOCSIS1 1 dynamic MAC messages DSX messages Dynamic Service Add DSA This message is used to create a new service flow Dynamic Service Change DSC This message is used to chang...

Страница 55: ...ragmentation on the upstream prevents large data packets from affecting real time traffic such as voice and video Large data packets are fragmented and then transmitted in the time slots that are available between the time slots used for the real time traffic DOCSIS 1 1 MAC Scheduler The MAC scheduler controls all time slot assignment on the shared upstream channel This block has been redesigned t...

Страница 56: ... Grants with Activity Detection USG AD Combination of UGS and RTPS to accommodate real time traffic that might have periods of inactivity such as voice using silence suppression The service flow uses UGS fixed grants while active but switches to RTPS polling during periods of inactivity to avoid wasting unused bandwidth The DOCSIS 1 1 QoS framework is based on the following objects Service class A...

Страница 57: ...ice flow Each service flow can also have a Payload Header Suppression PHS rule associated with it to determine which portion of the packet header will be suppressed when packets are transmitted on the flow Figure 1 3 illustrates the mapping of packet classifiers Note By default the system does not enforce any specific QoS profile on the CM The QoS profile assigned to the CM depends on the class of...

Страница 58: ...IOS Release 12 2XF software typically drops packets to enforce the rate limit Dropping packets from the requesting CM causes the host sending the information to retransmit its information Retransmitted information wastes bandwidth on the network If both hosts sending and requesting information are on the cable plant the upstream bandwidth is wasted as well The traffic shaping feature delays the sc...

Страница 59: ...and Class Manager The Service Template and Class Manager is a software module that controls the creation updating and cleanup of various QoS service templates and user defined service classes on the CMTS Commands Router show cable service class Router config cable service class n Router debug cable qos DOCSIS 1 1 Software Infrastructure Supports CableLabs specifications for high speed Data over Ca...

Страница 60: ...representative ensures that appropriate databases are updated to activate and support the new subscriber account in the provisioning billing or network management systems in use for the network Each CM or STB serial number and MAC address is typically stored in the billing and administrative system Initial and station maintenance management messages are sent to maintain communications between CMs ...

Страница 61: ...LOG_UCD_NEW_US_FREQUENCY 19984000 6d17h 580452 536 CMAC_LOG_SLOT_SIZE_CHANGED 8 6d17h 580452 616 CMAC_LOG_FOUND_US_CHANNEL 4 6d17h 580452 618 CMAC_LOG_UCD_MSG_RCVD 2 6d17h 580452 620 CMAC_LOG_UCD_MSG_RCVD 3 6d17h 580452 624 CMAC_LOG_UCD_MSG_RCVD 4 6d17h 580452 630 CMAC_LOG_MAP_MSG_RCVD 6d17h 580452 632 CMAC_LOG_INITIAL_RANGING_MINISLOTS 40 6d17h 580452 634 CMAC_LOG_STATE_CHANGE ranging_1_state 6d1...

Страница 62: ...sms to support guaranteed delay or jitter sensitive traffic on the shared multiple access upstream link For additional information refer to the document titled TCC Card for the Cisco uBR10000 Series Router on Cisco com and the Documentation CD ROM DOCSIS 1 1 TLV Parser and Encoder The Type Length Value TLV parser and encoder is a new module that handles parsing and encoding TLVs on the CMTS All ol...

Страница 63: ... CAC is not enabled the default DOCSIS scheduling mode blocks traffic after a certain number of calls Unsolicited Grant Services with Activity Detection UGS AD and Non Real Time Polling Service nrtPS are not supported New and Changed Commands cable upstream n scheduling type Use this new command to turn the various scheduling modes on or off where n specifies the upstream port Router config if no ...

Страница 64: ...municates with each module in the chassis to provide information as programmed in the RF Switch module bitmap Cisco IOS Release 12 3 13a BC performs polling every 10 seconds in response to this command and reports RF Switch information as stored in cache In normal operation the switch requires from two to five seconds for SNMP response If SNMP errors are detected in response to this command the sw...

Страница 65: ...ments on Cisco com N 1 Redundancy for the Cisco Cable Modem Termination System Cisco CMTS Feature Guide http www cisco com en US docs cable cmts feature guide uFGnpls1 html Cisco CMTS IOS Cable Command Reference Guide http www cisco com en US docs ios cable command reference cbl_book html Globally Configured HCCP 4 1 and 7 1 Redundancy on the Cisco uBR10012 Router Cisco IOS Release 12 3 17a BC int...

Страница 66: ...cable interface redundancy feature where one cable interface is designated the working interface and a second cable interface is the protect interface The protect interface comes online only when the working interface fails The N 1 Redundancy feature allows a single cable interface to act as the protect interface for up to 7 cable interfaces in the Cisco uBR10012 router thereby significantly reduc...

Страница 67: ...icast 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 mibv5ubr html Dynamic Shared Secret for the Cisco CMTS http www cisco com en US docs cable cmts feature ubrdmic html IP Multicast in Cable Networks White Paper http www cisco com en US tech tk828 technologies_c...

Страница 68: ...ng Engines cable monitor Command COPS TCP Support for the Cisco Cable Modem Termination System Packet Intercept PXF ARP Filter PXF Divert Rate Limiting Service Independent Intercept SII Support Access Control List Support for COPS Intercept Cisco IOS Release 12 3 13a BC introduces enhanced support for Access Control Lists ACLs and associated commands for the Common Open Policy Service COPS feature...

Страница 69: ...can be used for either data or digitized higher priority connections The feature is controlled by the new interface command cable intercept which requires a MAC address an IP address and a Universal Data Protocol UDP port number as its parameters cable intercept mac address ip address udp port When activated the Cisco uBR10012 router examines each packet for the desired MAC address When a matching...

Страница 70: ...config if cable monitor interface GigabitEthernet0 1 mac address 000e 5cc8 fa5f packet type data ethernet Router config if mac address 000e 5cac 59f8 packet type data ethernet To display cable monitor configuration and status information use the show interfaces command in Privileged EXEC mode Router show interfaces cable 3 0 monitor US Time Outbound Flow Flow Type Flow Packet MAC MACEncap DS Stmp ...

Страница 71: ...ence cbl_book html cable monitor Command Cisco IOS Release 12 2 4 XF supports the cable monitor command which allows an external LAN packet analyzer or other server to monitor inbound and outbound data packets for specific types of traffic sent between the Cisco CMTS and the CMs on a cable interface This feature enables the CMTS administrator to analyze traffic problems with customer data exchange...

Страница 72: ...fault the COPS engine takes the DSCP value used by the COPS server that initiates the TCP connection Usage Guidelines The cops ip dscp command allows the Cisco router to re mark the COPS packets for either incoming or outbound connections 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 d...

Страница 73: ...s4 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 section on page 1 48 For additional...

Страница 74: ...port for COPS Intercept section on page 1 48 For additional information about configuring COPS on the Cisco CMTS refer to the following documents on Cisco com Cable Monitor and Intercept Features for the Cisco CMTS http www cisco com en US docs cable cmts feature guide ufg_cmon html Configuring COPS for RSVP http www cisco com en US docs ios 12_2 qos configuration guide qcfcops_ps1835_TSD_Produ ct...

Страница 75: ...ion refer to the following document on Cisco com Cable ARP Filtering http www cisco com en US docs cable cmts feature cblarpfl html PXF Divert Rate Limiting Cisco IOS Release 12 3 17a BC introduces PXF Divert Rate Limiting feature Rate limiting on the divert path causes packets that will cause congestion to toRP queues to be dropped before any packets have been queued so valid packets are unaffect...

Страница 76: ... 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 provider s traditional telephony equipment The objective of the SII feature is to enable service providers with New World networks that legally al...

Страница 77: ... by a CM in the same MAC domain For additional information refer to the Setting Optional Broadcast and Cable IP Multicast Echo section on page 3 29 Multicast QoS Support on the Cisco uBR10012 CMTS Cisco IOS Release 12 3 13a BC introduces support for Multicast downstream QoS feature This feature provides the ability to assign static mapping to a multicast group The Multicast downstream QoS feature ...

Страница 78: ...E membership reports for the well known sources associated with this group When the router receives an IGMP version 1 or version 2 membership report for group G the router uses SSM mapping to determine one or more source IP addresses Si for group G SSM mapping then translates the membership report as an IGMP version 3 report INCLUDE G S1 G S2 G Sn G and continues as if it had received an IGMP vers...

Страница 79: ...rp filter command introduced with Cisco IOS Release 12 2 15 BC2b enables service providers to filter ARP request and reply packets This prevents a large volume of such packets from interfering with the other traffic on the cable network Cisco IOS Release 12 3 9a BC introduces enhanced command option syntax for the cable arp filter command where number and window size values are optional for reply ...

Страница 80: ...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 that would exceed this number number Optional Number of ARP reply packets that is allowed for each SID within the window time period The allowable range is 0 to 20 packets with a default of 4 packet...

Страница 81: ... spoofing ARP does not work for networks that do not use ARP for address resolution ARP does not generalize to all network topologies for example more than one router connecting two physical networks For configuration information refer to Activating Cable Proxy ARP Requests section on page 3 27 Integrated Time of Day Server This operational feature allows theCisco uBR10012 router to respond to tim...

Страница 82: ...l the Cisco IOS software must reset the interfaces to enable the change This normally does not significantly affect operations on the interface except that when this is done on a cable interface it causes all cable modems on that particular downstream to reinitialize potentially interfering with data transmission on that downstream Therefore you should use routing global configuration commands suc...

Страница 83: ...Control monitors multiple system level resources on the Cisco CMTS and performs automatic resource allocation on a service request basis Admission Control maintains optimal system level operation by preventing resource consumption that would otherwise degrade the performance for the entire Cisco CMTS Furthermore Admission Control can allocate upstream or downstream bandwidth resources to specific ...

Страница 84: ...urces Interface bundling supports sharing one IP subnet across multiple cable interfaces grouped into a cable interface bundle with support for bundle masters This feature can be used with Multiprotocol Label Switching MPLS configurations For configuration information refer to the cable bundle command in the Cisco CMTS IOS Cable Command Reference Guide on Cisco com CNEM Compliance The Consistent N...

Страница 85: ...al broadband router The DOCSIS Set Top Gateway DSG feature allows the Cisco CMTS to provide a class of cable services known as out of band OOB messaging to set top boxes STBs over existing DOCSIS networks This allows MSOs and other service providers to combine both DOCSIS and STB operations over one open vendor independent network without any change to the existing network or cable modems DSG is a...

Страница 86: ...SG 1 0 DSG Issue 1 0 is oriented to the DOCSIS DSG I01 specifications while DSG Issue 1 1 is oriented towards DOCSIS DSG I02 specifications to include the new Advanced Mode DSG A DSG The following DSG 1 1 features are supported in 12 3 13a BC while continuing support for Basic Mode DSG DSG 1 1 enables the learning of dynamic tunnel definitions DSG 1 0 only had static tunnel definitions programmed ...

Страница 87: ...op Gateway Issue 1 1 for the Cisco CMTS http www cisco com en US docs cable cmts feature ubradsg html DOCSIS Set Top Gateway DSG for the Cisco CMTS http www cisco com en US products hw cable ps2217 products_feature_guides_list html Cisco DOCSIS Set top Gateway White Paper http www cisco com en US products hw cable ps2217 products_white_paper09186a00801b3f0f shtml CableLabs DOCSIS Set top Gateway D...

Страница 88: ...cements to downstream load balancing resulting in equalized upstream load balancing group members This enhancement synchronizes the pending statistic between different cable interface line cards in the load balancing group This enhancement performs downstream load balancing that accounts for loads on upstream channels in the same upstream load balancing group rather than on the basis of the entire...

Страница 89: ...roup Dynamic Channel Change for Load Balancing entails the following new or enhanced commands in Cisco IOS Release 12 3 17a BC and later releases Global Configuration Commands cable load balance group group num dcc init technique 0 4 cable load balance group group num policy pcmm ugs cable load balance group group num threshold load pcmm stability ugs 1 100 cable load balance group group num thres...

Страница 90: ...sed bandwidth on the Cisco uBR10012 router Note FastEtherChannel FEC interfaces and ATM trunking are not supported on the Cisco uBR10012 router EtherChannel provides Gigabit Ethernet GE speeds by grouping multiple GE speed ports into a logical port channel that supports speeds up to 8 Gbps This provides fault tolerant high speed links between switches routers and servers Trunking is configured bet...

Страница 91: ...ications Guide http www cisco com en US docs cable cmts mib reference guide mibv5ubr html SNMP Object Navigator http www cisco com pcgi bin Support Mibbrowser unity pl CISCO CABLE METERING MIB The CISCO CABLE METERING MIB contains objects that provide subscriber account and billing information in the Subscriber Account Management Interface Specification SAMIS format also known as Usage Based Billi...

Страница 92: ...nts ccsFlapListMaxSize and ccsFlapListCurrentSize SNMP objects provide additional description for cable flap lists Added the ccsCmFlapTable to replace the ccsFlapTable The new object uses downstream upstream and Mac as indices to replace the ccsFlapTable object The enhanced ccsSNRRequestTable object provides a table of SNR requests with modified description Added the ccsUpSpecMgmtUpperBoundFreq ob...

Страница 93: ...S MIB on the Cisco uBR10012 universal broadband router with PRE2 modules 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 uBR10012 router Note Refer to the Cisco CMTS Universal Broadband Router MIB Specifications Guide on Cisco com for additional information and MIBs constraints DOCS QOS MI...

Страница 94: ...ch OUI is excluded the excluded OUI is disabled for all interfaces This method uses a list of OUI values recording which modems are sent and not sent pre equalization 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 ...

Страница 95: ...e PRE Console configure the following commands Router conf t Enter configuration commands 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 uBR10012 router verify the configuration with the following...

Страница 96: ...mand 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 Route Processor Redundancy Support Cisco IOS Release 12 2 4 XF introduces support for Route Processor Redundancy RPR on the Cisco uBR10012 universal broadband router The RPR feature enables the Cisco uBR10012 to use two PRE1 or PRE2 modules in a redundant configuration so...

Страница 97: ... Remote Query The cable modem remote query command was introduced for the Cisco uBR10012 router in the Cisco IOS Release 12 2 4 BC1b and allows customers to query the cable modem performance statistics directly from the cable modem termination system CMTS Users can poll the cable modems periodically using Simple Network Management Protocol SNMP and cache the information such as IP address MAC addr...

Страница 98: ...ducing the channel width Performs Cisco Network Registrar CNR calculations using DSP algorithms in real time on a per interface and a per modem basis Intelligently determines when to modify the frequency channel width or modulation profile based on CNR calculations in the active channel the number of missed station maintenance polls and the number of correctable or non correctable Forward Error Co...

Страница 99: ...mmand The cable submgmt static cpe override command enables Multiple Service Operators MSOs to override network DHCP settings on CPE devices when performing troubleshooting with a laptop computer and console connection to the Cisco universal broadband router For additional information about using the cable submgmt static cpe override command refer to these documents on Cisco com Cisco CMTS Static ...

Страница 100: ... on a service flow basis Monitoring window duration increased from seven to 30 days For additional information about STM 1 1 and Cisco CBT 3 2 refer to the following document on Cisco com Subscriber Traffic Management for the Cisco CMTS http www cisco com en US docs cable cmts feature ubsubmon html Release Notes for Cisco Broadband Troubleshooter Release 3 2 http www cisco com en US products sw ne...

Страница 101: ...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 document on Cisco com Configuring PacketCable on the Cisco CMTS http www cisco com en US docs cable cmts feature pcktcbl html PacketCable Emergency 911 Cable Interface Line Card Prioritization Cisco IOS Release...

Страница 102: ...how cable calls interface slot subslot for the Cisco uBR10012 router show cable modem ip_addr mac_addr interface calls To set the call window in minutes during which the Cisco CMTS maintains records of Emergency 911 calls use the cable high priority call window command in global configuration mode To remove the call window configuration from the Cisco CMTS use the no form of this command cable hig...

Страница 103: ... 0 Cable8 1 3 0 0 0 0 Cable8 1 4 0 0 0 0 Total 0 0 0 1 The following command example illustrates available information when making a voice call from the same MTA to another MTA on the same interface Router show cable calls Interface ActiveHiPriCalls ActiveAllCalls PostHiPriCallCMs RecentHiPriCMs Cable5 0 0 0 0 0 0 Cable5 0 1 0 0 0 0 Cable5 1 0 0 0 0 0 Cable5 1 1 0 0 0 0 Cable5 1 2 0 0 0 0 Cable5 1...

Страница 104: ...ing high priority MAC Address IP Address I F Prim CMCallStatus LatestHiPriCall Sid min sec The above example illustrates that call information disappears when a call ends The following example illustrates a new Emergency 911 call on the Cisco CMTS Router show cable modem calls Cable Modem Call Status Flags H Active high priority calls R Recent high priority calls V Active voice calls including hig...

Страница 105: ...the Cisco CMTS Cisco IOS Release 12 3 13a BC introduces support for PacketCable Multimedia PCMM on the Cisco uBR10012 universal broadband router and fully supports the CableLabs PacketCable Multimedia Specification PKT SP MM I02 040930 http www cablelabs com packetcable specifications multimedia html As described by CableLabs some key features of the PCMM service delivery framework include the fol...

Страница 106: ... committed the DSX message is generated and sent immediately by the Cisco CMTS Therefore the Policy Server sends all of the service flow information necessary to setup the service flow to the Cisco CMTS instead of the cable modem This causes a major change in the state machine that controls the gate allocation procedures New timer definitions and event actions are supported on PCMM New timer defin...

Страница 107: ...tCable is a registered trademark of CableLabs Additional information and specifications are available online at the following CableLabs websites PacketCable website http www cablelabs com packetcable PacketCable Multimedia specifications http www cablelabs com packetcable specifications multimedia html Security Features The Cisco uBR10012 router supports multiple security features Address Verifica...

Страница 108: ...m sending an arp downstream to CPE hosts or to devices behind CMs requesting an IP MAC address association If the CMTS already knows the association or is able to learn it in some other manner IP packets are forwarded Otherwise if the destination is unknown the packets are dropped Devices on a CM network may share a large subnet but cannot communicate with each other without first going through th...

Страница 109: ...nd router with newly supported interoperability for the following additional software features CBT 3 2 Spectrum Management Support with the Cisco uBR10 MC5X20S U BPE page 1 90 Subscriber Traffic Management STM Version 1 1 page 1 80 Multiple Service Operators MSO provide a variety of services such as TV video on demand data and voice telephony to subscribers Network Administrators and radio frequen...

Страница 110: ...inislots This helps ensure a low access delay for CMs at low loads due to the abundance of request opportunities At high upstream loads the scheduler has data grants to be served before allocating the next request region and automatically reduces the number of request minislots The initial ranging slots also called initial maintenance slots are each about 2 msecs wide These slots are used by CMs j...

Страница 111: ...er including support in a high availability environment with HCCP N 1 Redundancy The Online Offline Diagnostics OOD feature introduces a Field Diagnostic tool that provides a method of testing and verifying line card hardware problems This feature is supported on the following field replaceable units FRUs of the Cisco uBR10012 router Cisco uBR10012 PRE1 and PRE2 Performance Routing Engine PRE1 and...

Страница 112: ...ion ratios evolve 1x6 1x4 1x1 For example the line card can be used in 1x1 configuration for a business customer and in 1x7 configuration for residential customers For additional information about configuring virtual interfaces and frequency stacking refer to the following document on Cisco com Virtual Interfaces and Frequency Stacking Configuration on MC5x20S and MC28U Linecards http www cisco co...

Страница 113: ...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 of connectivity on physical interfaces should there be a failure problematic online insertion and removal OIR of one line card in the bundle or erroneous removal of configuratio...

Страница 114: ... Tunneling Features The Cisco uBR10012 router supports multiple features and functions for virtual private networks VPNs to include the following Dynamic SID VRF Mapping Support Generic Routing Encapsulation GRE Tunneling on the Cisco uBR10012 IPv6 over L2VPN MPLS VPN Network Support NetFlow Accounting Versions 5 and 8 Support Transparent LAN Service TLS on the Cisco uBR10012 Router with IEEE 802 ...

Страница 115: ...low Accounting Versions 5 and 8 Support Cisco IOS Release 12 3 9a BC introduces support for NetFlow Accounting Versions 5 and 8 on the Cisco uBR10012 router Note The Cisco uBR10012 router requires the PRE2 performance routing engine module to support Netflow in Cisco IOS Release 12 3 9a BC and later releases in the 12 3 BC train Also note that performance with packets per second PPS is reduced by ...

Страница 116: ...ng enough to contain the version and count fields Next we recommend you verify that the version is valid 1 or 5 and that the number of received bytes is enough for the header and count flow records using the appropriate version Because NetFlow export uses UDP to send export datagrams it is possible for datagrams to be lost To determine whether or not flow export information is lost the version 5 h...

Страница 117: ...in the version 8 header 12 15 input and output Input and output interface s SNMP index 16 19 dPkts Packets in the flow 20 23 dOctets Total number of Layer 3 bytes in the flow s packets 24 27 First SysUptime at start of flow 28 31 Last SysUptime at the time the last packet of flow was received 32 35 srcport and dstport TCP UDP source and destination port number or equivalent 36 39 pad1 tcp_flags pr...

Страница 118: ...ice providers to create a Layer 2 tunnel by mapping an upstream service identifier SID to an IEEE 802 1Q Virtual Local Area Network VLAN For additional information about configuring TLS on the Cisco uBR10012 CMTS refer to the following document on Cisco com Transparent LAN Service over Cable http www cisco com en US docs cable cmts feature tls cmts html Cisco TLS for the Cisco uBR10012 router requ...

Страница 119: ...re 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 Premises Equipment CPE does not display in the output of the show cable modem command Refer to the following document on C...

Страница 120: ...sco uBR10012 Universal Broadband Router Software Configuration Guide OL 1520 05 Chapter 1 Overview of Cisco uBR10012 Universal Broadband Router Software Supported Software Features for the Cisco uBR10012 Router ...

Страница 121: ...igned to configure the Cisco uBR10012 router automatically after connection to your WAN Configuring the Cisco uBR10012 Router Using the Setup Facility section on page 2 8 Describes how to use the Setup facility also called the System Configuration dialog for configuring your CMTS an alternative to AutoInstall The Setup facility supports several functions so that cable interfaces and cable interfac...

Страница 122: ...ol TFTP servers and time of day ToD servers Network management systems Other configuration or billing systems Ensure that DHCP and DOCSIS configuration files have been created and pushed to appropriate servers so that each CM when initialized can Transmit a DHCP request Receive an IP address Obtain TFTP and ToD server addresses Download a DOCSIS configuration file or updated software image if usin...

Страница 123: ...uter before you can enter an EXEC command Step 1 Connect a terminal to the I O controller console port of the Cisco uBR10012 router and establish a terminal session You can open a Terminal application Hyper Terminal on a PC as follows a Connect using Direct to Com 1 b Set bits per second 9600 c Set data bits 8 d Set parity none e Set stop bit 1 f Set flow control none Step 2 Power on the Cisco uBR...

Страница 124: ...password is encrypted however and must be replaced with a new enable secret password Overview of the Password Recovery Process Following is an overview of the general steps in the password recovery procedure Step 1 If you can log in to the router enter the show version command to determine the existing configuration register value Step 2 Press the Break key to get to the bootstrap program prompt R...

Страница 125: ... This action causes the router to enter the ROM monitor and display the ROM monitor prompt rommon 1 Step 6 To set the configuration register on a Cisco uBR10012 router use the configuration register utility by entering the confreg command at the ROM monitor prompt as follows rommon 1 confreg Answer yes to the enable ignore system config info prompt and note the current configuration register setti...

Страница 126: ...password1 Router config enable password newpassword2 Router config line con 0 Router config password newpassword3 Change only the passwords necessary for your configuration You can remove 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 administ...

Страница 127: ... Configuration Fundamentals Configuration Guide Release 12 2 at http www cisco com univercd cc td doc product software ios122 122cgcr ffun_c index htm Cisco IOS Configuration Fundamentals Command Reference Release 12 2 at http www cisco com univercd cc td doc product software ios122 122cgcr ffun_r index htm Preparing for the AutoInstall Process Complete the following steps to prepare your Cisco uB...

Страница 128: ...outer does not have a configuration stored in NVRAM the router attempts to run AutoInstall at startup Tip The router might take several minutes to determine that AutoInstall is not set up to a remote TCP IP host When the router determines that AutoInstall is not configured it defaults to the Setup facility If the LAN or WAN cable is not connected the router boots from Flash memory and automaticall...

Страница 129: ...r only at initial system startup On subsequent uses of the Setup facility the script begins with the following prompt System Configuration Dialog Continue with configuration dialog yes no yes At any point you may enter a question mark for help Use ctrl c to abort configuration dialog at any prompt Default settings are in square brackets Basic management setup configures only enough connectivity fo...

Страница 130: ...ure IP yes Configure IGRP routing yes Your IGRP autonomous system number 1 15 Step 8 Configure your line card interface parameters The following example shows how an 8 port Ethernet line card is installed in line 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 defa...

Страница 131: ...0 0 end Step 10 When asked if you want to use this configuration enter yes or press Return Use this configuration yes no yes Step 11 Save your settings to NVRAM Refer to the Configuring the Cable Interface with the Extended Setup Facility section on page 2 14 Note You must always manually save the configuration settings to NVRAM whenever they are modified Configuring Upstream Frequencies Upstream ...

Страница 132: ...efine upstream modulation profiles Complete these steps to activate upstream interfaces Step 1 After the Setup facility has initially configured noncable interfaces on the Cisco uBR10012 router enter the enable command and your password privileged EXEC Step 2 Enter the configure terminal command to get into global configuration mode Step 3 In global configuration mode configure modulation profiles...

Страница 133: ...to enter configuration mode from the terminal Router configure terminal Enter configuration commands one per line End with CNTL Z Router config Tip To see a list of the configuration commands available to you enter at the prompt or type help while in configuration mode Step 5 At the Router config prompt enter the interface type slot port command to enter the interface configuration mode Router con...

Страница 134: ...onfiguration dialog Continue with configuration dialog yes no yes MAC Layer Addressing The MAC layer or hardware address is a standardized data link layer address required for certain network interface types These addresses are not used by other devices in the network they are unique to each port The Cisco uBR10012 router uses a specific method to assign and control the MAC layer addresses for lin...

Страница 135: ...ed upconverter and an intermediate frequency IF output which must be connected to an external upconverter Identifying CM Line Card Slots On the Cisco uBR10012 router the cable interface line card is fixed and is always slot 1 To display information about a specific cable interface slot s downstream channel use the show interfaces cable command with the CM card s slot number and downstream port num...

Страница 136: ...ber 1 Configure CLNS no Configuring interface parameters Do you want to configure FastEthernet0 0 interface yes Use the 100 Base TX RJ 45 connector yes Operate in full duplex mode no Configure IP on this interface yes no Do you want to configure Ethernet1 0 interface yes n Do you want to configure Cable5 0 0 interface yes Downstream setting frequency 531000000 For cable upstream 0 Shut down this u...

Страница 137: ...an upstream port frequency Router show controllers cable slot port upstream Use this 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 provides examples of Cisco uBR10012 router configurat...

Страница 138: ...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 pk output of this command reveals a CM that is regi...

Страница 139: ...ined can be housed in a chassis Cable interface line cards support varied downstream and upstreams ports Refer to the Hardware Supported on the Cisco uBR10012 Router section on page 1 8 for a summary The Cisco IOS software command line interface CLI can be used to configure the Cisco cable interface line card for correct operation on the hybrid fiber coaxial HFC cable network This chapter describe...

Страница 140: ...onfiguring Cable Interface Features for the Cisco uBR10012 Router The Cisco Cable Modem Termination System Feature Guide at http www cisco com en US docs cable cmts feature guide cmtsfg html contains several additional interface and router configurations applicable to the Cisco uBR10000 series CMTS ...

Страница 141: ...ck whether an interface is disabled use the show interfaces command in Privileged EXEC mode An interface that has been shut down is shown as administratively down in the show interfaces command display One reason to shut down an interface is if you want to change the electrical interface type or mode of a port online You replace the serial adapter cable for example and use software commands to res...

Страница 142: ...on page 3 5 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 6 Provides instructions to assign and verify a numeric channel ID to the downstream port on the Cisco cable interface line card Setting the Downstream Helper Address section on page 3 6 Provide...

Страница 143: ...he following command in cable interface configuration mode Verifying ARP Requests To verify that cable ARP is activated enter the more system running config command and look for the cable interface configuration information If ARP is activated it does not appear in this output If ARP is deactivated it appears in the output as no cable arp Router more system running config Building configuration Cu...

Страница 144: ...mode Enter the password You have entered privileged EXEC mode when the prompt displays the pound symbol Step 2 Router configure terminal Enter configuration commands one per line End with CNTL Z Router config Enters global configuration mode You have entered global configuration mode when the config prompt appears This command can be abbreviated to config t or conf t Step 3 Router config interface...

Страница 145: ...sition time for new installations Failure to use these commands in conjunction or to test the involved CMs can result in customer service outages of indefinite duration Verifying the Downstream Channel ID To verify the downstream channel ID enter the show controllers cable command for the downstream port you have just configured See the following example Router show controllers cable5 0 0 downstre...

Страница 146: ...he provisioning servers Ping the DHCP server using the source IP address option the primary IP address of a cable interface Check IP routing if the cable interfaces acquire an RF upstream and downstream lock but do not stay up Step 4 Check DHCP options and the IP address of the Time of Day ToD server Ping the ToD server using the source IP address option Check IP routing Verify that the TFTP filen...

Страница 147: ...ion define the speed in symbols per second at which data travels downstream to the subscriber s CM A symbol is the basic unit of modulation Quadrature Phase Shift Key QPSK encodes 2 bits per symbol Quadrature Amplitude Modulation QAM 16 encodes 4 bits per symbol QAM 64 encodes 6 bits per symbol and QAM 256 encodes 8 bits per symbol Note Setting a downstream modulation rate of QAM 256 requires appr...

Страница 148: ... line cards The cable interface line card s downstream ports and the connected CMs on the network must be set to the same MPEG framing format and must support DOCSIS operations as appropriate The following command appears in the Cisco uBR10012 router configuration file to designate Annex B operation This command sets the downstream MPEG framing format Router config if cable downstream annex B Veri...

Страница 149: ...he modulation rate needed Step 6 Verify that the downstream carrier is active using the cable downstream if output command 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 config if cable downstream rate limit token...

Страница 150: ...stream data that might have been corrupted Activating the Upstream Ports section on page 3 14 Provides instructions to activate upstream ports Each upstream port must be activated to enable upstream data transmission from the CMs on the HFC network to the Cisco uBR10000 series CMTS Activating Upstream Power Adjustment section on page 3 15 Provides instructions to enable upstream power adjustment T...

Страница 151: ...et to 100 the CMTS will only allow a total up to the real available upstream bandwidth to be guaranteed If percentage is set to its maximum of 1000 then up to 10 times the real interface bandwidth may be guaranteed Setting the Upstream Input Power Level section on page 3 22 Provides instructions to set the upstream input power level in decibels per millivolt dBmV and provides additional informatio...

Страница 152: ...lid frequency for your router Activating Upstream Differential Encoding Differential encoding on the upstream is a digital encoding technique whereby a binary value is denoted by a signal change rather than a particular signal level To enable differential encoding on upstream traffic to a specified cable interface use the following command in cable interface configuration mode Upstream differentia...

Страница 153: ...g config command output If FEC is disabled no FEC entry appears in the output Perform these 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 t...

Страница 154: ...ctivating Upstream Power Adjustment To enable upstream power adjustment for 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 retu...

Страница 155: ...ivate the upstream scrambler use the following command in cable interface configuration mode The upstream scrambler is enabled by default Router config if cable upstream usport scrambler Verifying the Upstream Scrambler To determine if the upstream scrambler is activated enter the more system running config command and look for the cable interface configuration information Perform these steps if y...

Страница 156: ...ine 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 Setting Upstream 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 bac...

Страница 157: ...th CMTS settings or a problem in the DOCSIS provisioning servers Note Upstream segments serving a relatively 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 c...

Страница 158: ... width for example if the spectrum management card is unable to find a usable 1 6 MHz upstream channel it automatically begins searching for usable 800 kHz channels Caution Higher symbol rates are more susceptible to RF noise and interference If you use a symbol rate or modulation format beyond the capabilities of your HFC network you might experience packet loss or loss of cable interface connect...

Страница 159: ...2 Use a recommended or previously tested modulation profile It is not uncommon to create a modulation profile that does not allow cable interface to headend communication Because each message type is individually specified some messages might not work Step 3 Verify using IP ping packets of varying lengths 64 to 1500 bytes Ping from the headend to the cable interface Step 4 Verify with your cable i...

Страница 160: ...erfaces to use this frequency as the center frequency Verifying the Upstream Frequency To verify the current value of the upstream frequency enter the show controllers cable command for the upstream port you have just configured Router show controllers cable5 0 0 u0 Cable5 0 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...

Страница 161: ...ducts Composite Second Order Beat CSO and Composite Triple Beat CTB values worsen by 2 dB for every 1 dB increased C N The return path laser immediately enters a nonlinear mode called clipping and all communication becomes unreliable Many return lasers send short bursts above the clipping thresholds and fail on longer or successive bursts You should not adjust your input power level by more than 5...

Страница 162: ...s use the following command in cable interface configuration mode Acceptable values are 2 4 8 16 32 64 and 128 The default is 8 Router config if cable upstream usport minislot size size For additional information about channel width and minislot size refer to the Cable Radio Frequency RF FAQs at http www cisco com en US customer tech tk86 tk319 technologies_q_and_a_item09186a0080134faa shtml Verif...

Страница 163: ...ce for the subscriber CPEs Upstream grant shaping is per cable interface per service ID SID Token bucket policing with shaping is the per upstream default rate limiting setting at the CMTS Shaping can be enabled or disabled for the token bucket algorithm To enable upstream traffic shaping for an upstream port on a Cisco cable interface line card use one of the following commands in cable interface...

Страница 164: ...m the following tasks to verify that traffic shaping is enabled on the upstream channel Step 1 Configure a low peak upstream rate limit for the CM in its QoS profile Either use the command line interface CLI to modify the modem s QoS profile or edit the modem s TFTP configuration file refer to the DOCSIS 1 1 for the Cisco uBR7200 Series Universal Broadband Routers feature module at http www cisco ...

Страница 165: ...is chapter This section provides instructions for several optional cable interface configurations These interface features pertain to heightened performance and security measures Note Default settings are typically adequate to configure optional features on the system Change default settings only with careful prior analysis Activating Host to Host Communication Proxy ARP Cable proxy ARP allows the...

Страница 166: ...ated or deactivated enter the more system running config command and look for the cable interface configuration information If cable proxy ARP has been activated it does not appear in the output If cable proxy ARP has been deactivated it appears in the output as no cable proxy arp Router more system running config Building configuration Current configuration interface cable5 0 0 ip address 1 1 1 1...

Страница 167: ...iver is now capable of restoring headers suppressed by CMs and the downstream driver is capable of suppressing specific fields in the packet header before forwarding the frame to the CM Command Purpose Router config if cable intercept xxxx xxxx xxxx Specifies a MAC address on the cable network for which interception capabilities are to be activated There is a limit of 10 MAC addresses Router confi...

Страница 168: ...ulticast echo command in cable interface configuration mode There are two types of multicast echo packets Control packet Internet Group Management Protocol IGMP packets that are destined for the router Data packet layer 3 packet used for switching Note The cable ip multicast echo command controls only control packets Data multicast echoing is always enabled and cannot be disabled Verifying IP Mult...

Страница 169: ... multicast traffic you therefore need to configure an output access list and apply it to each downstream interface Refer to the Cisco Broadband Cable Command Reference Guide on Cisco com for additional information on access lists and multicast echo http www cisco com en US docs ios cable command reference cbl_book html Setting IP Broadcast Echo By default the Cisco uBR10012 router does not echo IP...

Страница 170: ... page 3 38 Static Route PE to CE Routing Sessions Configuration Example section on page 3 38 Subinterface Configuration Example The following example shows how to define a subinterface on the cable5 0 0 interface cable5 0 0 No IP address MAC level configuration only first subinterface interface cable5 0 0 1 description Management Subinterface ip address 10 255 1 1 255 255 255 0 cable helper addres...

Страница 171: ...n Example The following example shows how to configure cable interface bundles Displaying the contents of the bundle Router config if cable bundle 1 255 Bundle number Router config if cable bundle 25 master Bundle master cr Router config if cable bundle 25 master cr Router config if cable bundle 25 master Router config if 07 28 17 uBR10000 5 UPDOWN Interface Cable5 0 0 Port U0 changed state to dow...

Страница 172: ...the router itself rd 100 2 Creates a list of import and or export route target communities for the VPN route target import 100 1 Maps a VRF table to the VPN called ISP2 VPN ip vrf ISP2 VPN Creates the route distinguisher and creates the routing and forwarding table of the router itself rd 100 3 Creates a list of import and or export route target communities for the VPN route target import 100 1 Ma...

Страница 173: ...alization parameters ip vrf forwarding MSO Defines a range of IP addresses and masks to be assigned to cable modems not yet associated with an ISP ip address 10 0 0 0 255 255 255 0 Disables the translation of directed broadcasts to physical broadcasts no ip directed broadcast Defines the DHCP server for cable modems whether they are associated with an ISP or with the MSO acting as ISP cable helper...

Страница 174: ...this cable interface no cable proxy arp no cable ip multicast echo Defines the DHCP server for cable modems whether they are associated with an ISP or with the MSO acting as ISP cable helper address 10 4 1 2 cable modem Defines the DHCP server for PC host devices cable helper address 10 4 1 2 host Configures the physical aspects of the 5 0 0 4 cable subinterface interface Cable5 0 0 4 description ...

Страница 175: ...ost brios 223 255 254 253 interface Loopback0 ip address 10 2 1 3 255 255 255 0 no ip directed broadcast interface Loopback1 no ip address no ip directed broadcast no ip mroute cache interface FastEthernet0 0 0 ip address 1 7 108 2 255 255 255 0 no ip directed broadcast no ip mroute cache shutdown full duplex no cdp enable router ospf 222 network 10 0 1 0 255 255 255 0 area 0 network 10 0 2 0 255 ...

Страница 176: ...ng commands in router configuration mode on the PE router Step 1 Define internal Border Gateway Protocol iBGP parameters for VPNv4 network layer reachability information NLRI exchange Router config router address family vpnv4 unicast Step 2 Define an IBGP session to exchange VPNv4 NLRIs Router config router af neighbor 200 28 28 45 remote as 48 Router config router af exit Step 3 Activate the adve...

Страница 177: ...ipv4 unicast vrf go_fast_internet_company Router config router af network 200 28 28 47 Static Route PE to CE Routing Sessions Configuration Example To configure static route PE to CE routing sessions use the following commands in router configuration mode on the PE router Step 1 Define static route parameters for each PE to CE session and for each BGP PE to CE routing session Router config ip rout...

Страница 178: ...3 40 Cisco uBR10012 Universal Broadband Router Software Configuration Guide OL 1520 05 Chapter 3 Configuring Cable Interface Features for the Cisco uBR10012 Router Cable Interface Configuration Examples ...

Страница 179: ...nnel request is known as insertion Activating CM Upstream Address Verification section on page 4 5 Ensures that only CMs that have received DHCP leases through the Cisco uBR10000 series CMTS can access the HFC network Clearing CM Counters section on page 4 6 Clears the counters for the CMs in the station maintenance list Clearing CM Reset section on page 4 6 Removes one or more CMs from the statio...

Страница 180: ... the CM registration phase use the no form of this command cable shared secret 0 7 authentication key no cable shared secret Syntax Description Examples The following example shows how to activate CM authentication using 3344912349988 sf as the shared secret key and indicating that an encrypted message follows Router config if cable shared secret 7 3344912349988cisco xapowenaspasdpuy230jhm sf Conf...

Страница 181: ...tivate the CM insertion interval use the following command in cable interface configuration mode Validating CM Insertion Interval To verify that a CM insertion interval has been set enter the command more system running config command and look for the cable interface configuration information as shown in this command output excerpt Router more system running config Building configuration Current c...

Страница 182: ...ng config and look for the cable interface configuration information If CM authentication has been activated it does not appear in this output If CM authentication has been deactivated it appears in this output as no cable secret shared as shown in this command output excerpt Router more system running config Building configuration Current configuration interface Cable5 0 0 ip address 1 1 1 1 255 ...

Страница 183: ...activated 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 0 ip address 1 1 1 1 255 255 255 0 no keepalive cable source verify cable insertion interval 2000 cable downstream annex B...

Страница 184: ...to start a reset sequence enter the show cable modem command Command Purpose clear cable modem mac addr counters Clears the counters in the station maintenance list for the CM with a specific MAC address clear cable modem ip addr counters Clears the counters in the station maintenance list for the CM with a specific IP address clear cable modem all counters Clears the counters in the station maint...

Страница 185: ...ging and bandwidth requests Algorithm that varies the backoff parameters that CMs use Backoff variation falls within each of the initial ranging and bandwidth request upstream contention subchannels In high contention mode the Cisco uBR10000 series MAC scheduler uses collision statistics and sustains a high frequency of initial ranging slots until it detects a steady ranging state The CMTS dynamic...

Страница 186: ...amic Map Advance Algorithm A CMTS administrator can enhance the upstream throughput from a CM connected to the Cisco uBR10000 series CMTS The system employs a new algorithm that automatically tunes the lookahead time in MAPs based on several input parameters for the corresponding upstream channel The use of dynamic and optimal lookahead time in MAPs significantly improves the per modem upstream th...

Страница 187: ...gher as well as in Cisco IOS Release 12 0 6 SC or higher To configure per modem filters use the following commands in cable interface configuration mode Command Purpose cable map advance dynamic n static Specifies a value to enhance the upstream throughput from a CM connected to the Cisco uBR10012 router The n argument provides the safety factor for the dynamic map advance algorithm This argument ...

Страница 188: ...ter settings are reset 8 If the user logs out or the login server detects that the user is not online the login server sets default filters for the CM or the CPE device Configuring Sync Message Interval To specify the sync message interval between successive sync message transmissions from the Cisco uBR10012 router use the following command in cable interface configuration mode Command Purpose Ste...

Страница 189: ...fig command and look for the cable interface configuration information If the sync message interval is deactivated or reset to its default value the no sync interval command line appears in the output Command Purpose cable sync interval msec no cable sync interval Specifies the interval in milliseconds between successive sync message transmissions from the Cisco uBR10000 series CMTS Valid values a...

Страница 190: ...4 12 Cisco uBR10012 Universal Broadband Router Software Configuration Guide OL 1520 05 Chapter 4 Managing Cable Modems on the Hybrid Fiber Coaxial Network Configuring Sync Message Interval ...

Страница 191: ... router downstream ports transmit IF signals 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 headen...

Страница 192: ...n options are limited only by available configuration file length The Cisco uBR10012 router 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 ...

Страница 193: ...d 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 connection disable cm Users are denied access to the cable network This configuration f...

Страница 194: ...rver 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 dhcp pool staticPC 012 host 10 254 1 12 255 255 255 0 client identifier 0108 0009 af34 e2 client name staticPC 012 lease infinite ip dhcp pool goldmodem host 10 128 1 129 255 255 255 0 client identifier 0100 1095 817f 66 bootfile gold cm ip dhcp pool DisabledModem 0010 aaaa...

Страница 195: ...le qos profile line con 0 transport input none line aux 0 line vty 0 4 login end To set up spectrum management in your configuration use the following commands to set up the critical elements cable spectrum group 1 frequency 40000000 cable spectrum group 1 frequency 20000000 2 In this illustration the user has configured spectrum management group number 1 to be available to upstream channels As de...

Страница 196: ... wherever they are configured to apply it Note that this modulation profile has been configured to operate with a QAM 16 modulation scheme The default modulation scheme for any upstream profile if it is not set to QAM 16 is QPSK Later in the configuration file example upstream port 0 on the cable interface card installed in slot 5 uses both the spectrum management and the modulation profile config...

Страница 197: ...nd options for deriving system information Using a Headend CM to Verify Downstream Signals section on page 6 12 Uses a Cisco uBR924 cable access modem to verify the downstream signal originating from a Cisco uBR10012 router Performing Amplitude Averaging section on page 6 12 The system uses an averaging algorithm to determine the optimum power level for a CM with low carrier to noise ratio that is...

Страница 198: ...nd so on The show cable flap list and show cable modem commands indicate when the Cisco uBR10012 router has detected an unstable return path for a particular modem and has compensated with a power adjustment An asterisk appears in the power adjustment field for a modem when a power adjustment has been made an exclamation point appears when the modem has reached its maximum power transmit level and...

Страница 199: ... flap list sort flap Mac Addr CableIF Ins Hit Miss CRC P Adj Flap Time 1eab 2c0b C6 0 0 U0 108 318 27 0 0 108 Sep 10 15 26 56 1eb2 bb07 C6 0 0 U0 0 293 31 1 1 1 Sep 10 15 15 49 7b6b 71cd C6 0 0 U0 1 288 32 0 0 1 Sep 10 15 12 13 1eb2 bb8f C6 0 0 U0 1 295 30 0 0 1 Sep 10 15 11 44 Router show cable flap list sort time Mac Addr CableIF Ins Hit Miss CRC P Adj Flap Time 00e0 2222 2202 C4 0 0 U0 464 2069...

Страница 200: ...ess of a specific modem to be displayed interface Displays all CMs on a specific CMTS cable interface mac address Identifies the MAC address of a specific CM to be displayed Available options when displaying information for a cable interface or for a single CM access group Displays access group connectivity Displays connectivity content counters Displays cable counters errors Displays error detail...

Страница 201: ...wer 0 dBmV SNR 33 25 dBmV Downstream Power 0 dBmV SNR dBmV Timing Offset 1624 Received Power 0 25 MAC Version DOC1 0 Capabilities Frag N Concat N PHS N Priv BPI Sid Said Limit Max Us Sids 0 Max Ds Saids 0 Optional Filtering Support 802 1P N 802 1Q N Transmit Equalizer Support Taps Symbol 0 Num of Taps 0 Number of CPEs 0 Max CPEs 0 Flaps 373 Jun 1 13 11 01 verbose Displays detailed information repl...

Страница 202: ... SID state offline the SID is removed immediately from the CMTS ranging list and an aging timer is started to clean up the SID completely if the CM does not attempt to come online within the next 24 hours Output fields are described below The SM Exhausted Count value refers to the number of times a CM was dropped because it did not reply to station maintenance requests A CM is removed from the sta...

Страница 203: ... cable modulation profile command CMTS01 show cable modulation profile 1 Mo IUC Type Preamb Diff FEC FEC Scrambl Max Guard Last Scrambl Preamb length enco T CW seed B time CW offset bytes size size size short 1 request qpsk 64 no 0x0 0x10 0x152 1 8 no yes 56 1 initial qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 1 station qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 1 short qpsk 72 no 0x5 0x4B 0x152 0 8 n...

Страница 204: ...te B class upstream upstream downstream burst mask value by priv bandwidth bandwidth bandwidth enab 1 0 0 0 0 0 0x0 0x0 cmts no 2 0 64000 0 1000000 0 0x0 0x0 cmts no 3 0 1000 0 1000 0 0x0 0x0 cmts no 4 7 2000000 100000 4000000 0 0x0 0x0 cm yes The following example displays verbose output for profile 1 Router show cable qos profile verbose hccp server show cable qos profile verbose Profile Index 1...

Страница 205: ... load 1 255 Encapsulation loopback not set keepalive not set ARP type ARPA ARP Timeout 04 00 00 Last input 4d07h 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 sec 0 packets sec 5 minute output rate 0 bits sec 0 packets sec 10908 packets input 855000 bytes 0 no buff...

Страница 206: ... 58c1 10 20 114 34 stat 2d1h36menable BE 1 6 0010 7bed 9dc9 10 20 114 37 stat 2d1h36menable BE 13 7 0010 7bed 9dbb 10 20 114 38 stat 2d1h36menable BE 15 8 0010 7b6b 58bb 10 20 114 112 stat 2d1h34menable BE 17 9 0010 7b6b 58bb 10 20 114 112 dyna 2d1h34menable BE 19 For additional information examples command history and related commands refer to the Cisco Broadband Cable Command Reference Guide on ...

Страница 207: ...ow cable modulation profile 1 Mo IUC Type Preamb Diff FEC FEC Scrambl Max Guard Last Scrambl Preamb length enco T CW seed B time CW offset bytes size size size short 1 request qpsk 64 no 0x0 0x10 0x152 1 8 no yes 56 1 initial qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 1 station qpsk 128 no 0x5 0x22 0x152 0 48 no yes 0 1 short qpsk 72 no 0x5 0x4B 0x152 0 8 no yes 48 For additional information example...

Страница 208: ...y Performing Amplitude Averaging The Cisco uBR10012 router 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 To avoid dropping flapping CMs the Cisco uBR10012 router averages a configurable number of RNG REQ messages before it makes power adjustments By compensating for a potentiall...

Страница 209: ...44 51 123 C7 1 0 U0 online 15 0 25 3691 0 no The asterisk in the show cable modem command output indicates that the CMTS is using the power adjustment method on this CM The symbol indicates that the CM has reached maximum transmit power This section documents the commands pertaining to amplitude averaging cable upstream power adjust noise cable upstream frequency adjust averaging Enabling or Disab...

Страница 210: ...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...

Страница 211: ...s Verifying Test Signal Output To verify the output of a continuous wave test signal or the output of a PRBS test signal use a spectrum analyzer on the downstream channel The downstream carrier is enabled as a default The standard mode of operation is modulated signal output and the interface is active For PRBS and continuous wave output the selected interface is shut down The functioning of the n...

Страница 212: ... 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 number of periodic ranging requests from a cable interface To ping a specific cable interface to determine if it is online use the following command in EXEC mode Verifying the Ping The...

Страница 213: ...and is activated all cable ARP request messages are displayed on the Cisco uBR10012 router console When this command is activated any errors that occur in the cable MAC protocol are displayed on the Cisco uBR10012 router console debug cable keyman for Baseline Privacy Activity To activate the debugging of key encryption key KEK and traffic encryption key TEK BPI key management use the debug cable ...

Страница 214: ...router console debug cable privacy for Baseline Privacy To activate the debugging of baseline privacy use the debug cable privacy command in privileged EXEC mode To disable debugging output use the no form of this command debug cable privacy no debug cable privacy debug cable qos To activate the debugging of QoS use the debug cable qos command in privileged EXEC mode To deactivate debugging of QoS...

Страница 215: ...generated by cable interfaces as they make requests to connect to the network are displayed on the Cisco uBR10012 router console debug cable reset for Reset Messages To activate the debugging of reset messages from cable interfaces on the HFC network use the debug cable reset command in privileged EXEC mode To deactivate debugging of cable reset messages use the no form of this command debug cable...

Страница 216: ...yed on the Cisco uBR10012 router console debug cable ucc for Upstream Channel Change Messages To activate the debugging of upstream channel change UCC 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...

Страница 217: ...Hz The cable interface supports NTSC channel operation using standard STD Harmonic Related Carrier HRC or Incremental Related Carrier IRC frequency plans conforming to EIA S542 NTSC uses a 6 MHz wide modulated signal with an interlaced format of 25 frames per second and 525 lines per frame NTSC is compatible with the Consultive Committee for International Radio CCIR Standard M PAL used in West Ger...

Страница 218: ...re upstream paths Depending on the CMTS configuration the CMTS MAC domain can be defined to have its downstreams on one cable interface line card with its upstreams on another card or one or more CMTS MAC domains per cable interface line card Cisco provides high speed routers to route interactive traffic between the backbone and Ethernet in the headend internal network Signaling protocols maintain...

Страница 219: ...All CMs listen to all frames transmitted on the downstream channel on which they are registered and accept those where the destinations match the units themselves or the devices that each CM supports The Cisco uBR10000 series CMTS supports multicast groups using standard protocols such as Protocol Independent Multicast PIM Distance Vector Multicast Routing Protocol DVMRP and Internet Group Managem...

Страница 220: ...ameters that CMs use within each of the two upstream contention subchannels The CMTS uses these algorithms to dynamically determine the initial ranging slots and bandwidth request minislots to allocate on the slotted upstream When power is restored after a catastrophic power failure a large number of CMs attempt to join the network simultaneously This represents an impulse load on the initial rang...

Страница 221: ...eature Typically the ToD server is embedded in the UNIX inetd and requires no additional configuration The TFTP server is usually disabled in the standard software but can be enabled by modifying the inetd conf file Microsoft NT server software includes a TFTP server that can be enabled with the services control panel Microsoft NT does not include a ToD server A public domain version of the ToD se...

Страница 222: ... Basic Internet access data which is asymmetrical asymmetrical traffic supports a larger data rate in one direction the downstream VoIP traffic which requires constant bandwidth has low tolerance to latency and jitter and is typically symmetrical supporting the same data rate in downstream and upstream directions VoIP generally requires phase lock and jitter attenuation VPN traffic which requires ...

Страница 223: ...rmine the over subscription level include Peak percentage of simultaneous users Not all subscribers access the network at the same time Subscribers have different access patterns that vary based on profiles working hours family demographics type of user telecommuter or residential Internet access customer Only a portion of subscribers are active at a given time This number serves as the peak perce...

Страница 224: ...A 8 Cisco uBR10012 Universal Broadband Router Software Configuration Guide OL 1520 05 Appendix A DOCSIS and CMTS Architectural Overview CMTS Traffic Engineering ...

Страница 225: ...ration 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 Protocol...

Страница 226: ...ds 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 rou...

Страница 227: ...le B 3 lists the default boot filenames or actions Note A boot system configuration command in the router configuration in NVRAM overrides the default netboot filename Bit 6 Bit 6 causes the 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 Table B 3 Default Boot Filenames Action File Name Bit 3 B...

Страница 228: ...acts with bit 14 which controls the network and subnet portions of the IP broadcast address Table B 4 shows the combined effect of bit 10 and bit 14 Note The console line rate on Cisco universal broadband routers is fixed at 9600 and cannot be changed For additional information about configuring baud rates refer to oneor more of these documents on Cisco com Replacing or Recovering Passwords in the...

Страница 229: ...OMmon If bit 13 is not set the router will continue to netboot images indefinitely The default setting for bit 13 is 0 If bit 13 is set the system boots the boot helper image found in boot flash memory without any retries Bit 15 Bit 15 enables diagnostic messages and ignores NVRAM contents Displaying the Configuration Register While Running Cisco IOS The configuration register can be viewed by usi...

Страница 230: ... in effect It includes a description of the bits See the following sample output o Configuration register 02x100 at last boot Bit Configuration register option settings 15 Diagnostic mode disabled 14 IP broadcasts do not have network numbers 13 Boot default ROM software if network boot fails 12 11 Console speed is 9600 baud 10 IP broadcasts with ones 09 Do not use secondary bootstrap 08 Break disa...

Страница 231: ...r about each bit See the following sample output rommon 1 confreg Confiuration Summary 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...

Страница 232: ...7200 VXR Installation and Configuration Guide OL 1520 05 Appendix B Configuration Register Information for the Cisco uBR10012 Universal Broadband Router Setting the Configuration Register While Running ROM Monitor ...

Страница 233: ...namic contention algorithm 4 7 dynamic map advance 4 8 dynamic ranging 1 90 modem power enhancement adjustments 1 22 QoS profile enforcement 1 23 token bucket 1 24 upstream rate limiting 3 24 amplitude averaging 6 12 ARP Address Resolution Protocol debug cable arp command 6 17 downstream requests 3 4 host to host communication activating Proxy ARP 3 26 overview 1 62 Proxy ARP 1 61 AutoInstall conf...

Страница 234: ...tream port number data backoff command A 4 cable upstream port number range backoff command A 4 cable upstream power adjust command 3 15 cable upstream power level command 3 22 cable upstream rate limit token bucket command 3 24 cable upstream scrambler command 3 16 cable upstream time adjust command 3 16 show interface cable command 3 27 cable flap list 1 91 cable interface configuring cable inte...

Страница 235: ...2 8 CNEM Compliance 1 64 CNR Cisco Network Registrar 1 15 Committed Access Rate CAR 1 60 concatenation DOCSIS 1 1 1 33 configurable registration timeout 1 60 configuration bit meanings B 9 configuration files reviewing modifications 2 17 samples 2 17 saving 2 17 configuration mode 1 15 configuring CMTS with 2 13 configuration procedures AutoInstall 2 7 setup command facility 2 8 configuration regi...

Страница 236: ...1 39 subscriber management 1 39 time slot scheduling 1 42 TLV parser and encoder 1 42 token bucket rate shaping 1 42 3 9 3 24 two way interoperability 1 42 downstream signals A 3 MAC domain A 2 driver 1 21 MPEG framing format 3 9 NTSC cable plants A 2 overview A 1 PHS Payload Header Suppression 1 24 1 35 specification summary A 1 two way architecture A 2 two way server requirements A 5 upstream si...

Страница 237: ...forward error correction 1 69 A 4 figures Cisco uBR10000 series slot numbering front view without bezel 1 6 Cisco uBR10000 series slot numbering rear view 1 7 classification within the MAC layer 1 37 DOCSIS two way architecture A 2 Two way Internet access network example 5 2 flap list cable 1 91 framing format MPEG 3 9 frequency setting upstream 3 20 3 21 frequency override downstream 1 68 G Gener...

Страница 238: ... 1 35 Management Information Base MIB Changes and Enhancements 1 70 MAPs 1 90 A 3 minislot 3 23 modem see cable modem modulation downstream 3 8 modulation downstream 3 8 MPEG downstream framing format 3 9 MPLS Multiprotocol Label Switching MPLS VPN support 1 95 multicast echo 3 28 Multicast QoS Support on the Cisco uBR10012 CMTS 1 57 multi SID support 1 36 N NVRAM Nonvolatile Random Access Memory ...

Страница 239: ... 1 38 downstream 1 38 3 9 3 10 upstream 1 24 1 38 3 24 3 25 registration timeout 1 60 4 7 RIP Routing Information Protocol 2 10 router overview of Cisco uBR10000 series 1 5 S sample configuration files 2 17 scheduling DOCSIS 1 1 scheduling information 1 42 scrambler activating 3 16 Secure Socket Layer Server for Usage Based Billing 1 76 security DOCSIS 1 0 BPI 1 19 DOCSIS 1 1 BPI 1 30 1 31 replaci...

Страница 240: ...class profiles 1 24 ToS overwrite 1 37 traffic encryption key TEK 2 18 traffic shaping 1 38 Transparent LAN Service TLS Layer 2 Virtual Private Networks 1 99 Transparent LAN Service TLS 1 98 troubleshooting amplitude averaging 6 12 downstream signals 6 12 upstream rate limiting 3 25 with dynamic ranging 1 90 U UDP User Datagram Protocol 1 62 upstream address verification 1 31 admission control 3 1...

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