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Glossary

Configuring the Cisco uBR900 Series Cable Access Routers

137

spectrum reuse

—CATV’s most fundamental concept. Historically, the over-the-air spectrum has

been assigned to many purposes other than that of carrying TV signals. This has resulted in an
inadequate supply of spectrum to serve the needs of viewers. Cable can reuse spectrum that is sealed
in its aluminum tubes.

subscriber unit (SU)

—An alternate term for cable access router. See

cable access router.

upstream

—The set of frequencies used to send data from a subscriber to the headend.

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Содержание uBR900 Series

Страница 1: ...IS qualified headend cable modem termination system CMTS Cisco uBR900 series routers connect computers telephone equipment and other customer premises devices at a subscriber site to the service provider s Hybrid Fiber Coax HFC and IP backbone network Functioning as cable modems the Cisco uBR900 series routers transport data and voice traffic on the same cable system that delivers broadcast TV sig...

Страница 2: ...ning For a list of the available software images for your application and the specific features contained in each image refer to the release notes for the Cisco uBR900 series cable access router and Cisco IOS software release you are using This document describes the features available for the Cisco uBR904 and uBR924 cable access routers in Cisco IOS Release 12 0 7 T The following feature sets are...

Страница 3: ...field in the DOCSIS configuration file The MAX CPE field defaults to one CPE device unless otherwise set to a higher number Home Office Easy IP The Home Office feature set provides high speed Internet connectivity for customers who have a small home network typically 2 4 computers In addition to full DOCSIS 1 0 support and all of the functionality of the Base IP Bridging feature set the Home Offic...

Страница 4: ... Point to Point Protocol PPP that allows computers on different physical networks to interoperate as if they were on the same local area network LAN These features are important components for Virtual Private Networks VPNs Note The Telecommuter feature set does not require the firewall feature set because the individual telecommuter has a secure connection to the office network The office network ...

Страница 5: ...e length data packets This results in the most efficient use of the available upstream timeslots or minislots The system uses Transmission Control Protocol Internet Protocol TCP IP to transmit data TCP IP transmits data in segments encased in IP datagrams along with checksums to detect data corruption and sequence numbers to ensure an ordered byte stream on the TCP connection between the Cisco cab...

Страница 6: ...is normally 6 to 10 dB system specific above the digital signal level QPSK 8 to 58 dBmV 16 QAM 8 to 55 dBmV Signal to Noise Ratio SNR 64 QAM 23 5 dB BER 10 8 256 QAM 30 dB BER 10 8 For input level between 15 and 8 dBmV SNR must be greater than 30 dB For input level between 8 and 15 dBmV SNR must be greater than 33 dB Note These performance numbers are in laboratory controlled conditions against st...

Страница 7: ...are time slotted and divided into basic scheduling time units The CMTS informs the Cisco cable access router of minislot structures on the upstream channel Some minislots are marked as contention based shared by routers to make bandwidth timeslot requests with the CMTS Others are grouped together into unicast grants for specific routers to send their data bursts Yet others are grouped together int...

Страница 8: ... parameters to work in a bridging mode You can configure a customized bridging application on the Cisco uBR900 series using a downloadable configuration file or the CLI See the sections Configuring Bridging on page 41 and Customizing the Cable Access Router Interface on page 44 for details Routing Applications The Cisco uBR900 series cable access router can be configured to act as a router to pres...

Страница 9: ...tware is dependent on a PPP connection supported on one of the directly attached interfaces A dial up PPP connection is required in order to initiate an L2TP Tunnel connection This is a requirement of the L2TP Access Concentrator LAC Currently the Cisco uBR900 series cable access router cannot function as the LAC it can only function as the L2TP Network Server LNS which terminates a tunnel created...

Страница 10: ...face instead of the cable interface and all packets received are translated to the correct private network IP address and routed out the Ethernet interface This eliminates the need to run RIP on the cable interface To implement NAT on the Cisco uBR900 series the Ethernet interface is configured with an inside address and the cable interface is configured with an outside address The Cisco uBR900 se...

Страница 11: ...upported to and from each subscriber site Multiple telephones and fax devices can be connected to each of the two VoIP telephone lines at a subscriber site providing the 5 REN limit is adhered to for each telephone line Note the following requirements and characteristics of VoIP applications using the Cisco uBR924 cable access router The telephones at each subscriber site must support touch tone d...

Страница 12: ...on voice compression Voice Activity Detection VAD or silence compression and Dual Tone Multi Frequency DTMF tone detection and generation The Cisco uBR924 cable access router supports multiple QoS service IDs SIDs enabling multiple classes of service on the cable interface This enables VoIP and data traffic to be treated separately with all data assigned to a default class of service while VoIP tr...

Страница 13: ...ications Union ITU standard that specifies call signaling and control protocols for a shared IP data network The Cisco uBR924 cable access router acts as an H 323 gateway In architectures using the VoIP H 323 protocol stack the session application manages two call legs for each call 1 a telephony leg managed by the voice telephony service provider 2 the VoIP leg managed by the cable system operato...

Страница 14: ...ures using the SGCP protocol stack the session application implements the gateway functionality defined to support both trunk and residential gateways The Cisco uBR924 functions in this mode as a residential gateway with two endpoints SGCP can preserve Signaling System 7 SS7 style call control information as well as additional network information such as routing information and authentication auth...

Страница 15: ...0 dB 1 5 dB Crosstalk 65 dBmO Amplitude jitter 20 300 Hz 4 300 Hz 2 5 Peak 2 9 Peak Phase jitter 20 to 300 Hz 4 to 300 Hz 1 5 P P 1 8 P P Envelope delay distortion 1704 Hz to 604 Hz 1704 Hz to 2804 Hz 1704 Hz to 204 Hz 1704 Hz to 3404 Hz 350 usec 195 usec 580 usec 400 usec Hybrid balance Echo Return Loss ERL SRL 26 dB standard test line 14 dB station off hook 21 dB standard test line 11 dB station...

Страница 16: ...ies cable access router is able to obtain two types of keys from the CMTS the Traffic Exchange Key TEK which is used to encrypt and decrypt data packets and the Key Exchange Key KEK which is used to decrypt the TEK IPSec Network Security IPSec Network Security IPSec is an IP security feature that provides robust authentication and encryption of IP packets IPSec is a framework of open standards dev...

Страница 17: ...rent applications Intrusion Detection System IDS that recognizes the signatures of 59 common attack profiles When an intrusion is detected IDS can either send an alarm to a syslog server or to a NetRanger Director drop the packet or reset the TCP connection User configurable audit rules Configurable real time alerts and audit trail logs For additional information see the description of the Cisco I...

Страница 18: ...ration file can specify a Cisco IOS image that the CMTS should also download to the router To speed up the time required to bring the router online the cable service provider can optionally preload the Cisco uBR900 series with the appropriate image at the warehouse To customize the cable access router s configuration further the DOCSIS configuration file can also specify a Cisco IOS configuration ...

Страница 19: ...mory and tries to reacquire the saved downstream channel the next time a request is made Note An ideal downstream signal is one that synchronizes QAM symbol timing FEC framing MPEG packetization and recognizes downstream sync MAC layer messages 2 Obtain upsteam channel parameters The cable access router waits for an upstream channel descriptor UCD message from the CMTS and configures itself for th...

Страница 20: ... not supported by the Cisco uBR900 series 7 Transfer operational parameters Using TFTP the router downloads the specified DOCSIS configuration file and configures itself for the appropriate parameters The DOCSIS configuration file defines the router s operating mode such as the provisioned downstream and upstream service assignments including assigned frequencies data rates modulation schemes Clas...

Страница 21: ...rameters Telnet access to the router from the headend is still allowed but only if the Cisco IOS configuration file includes enable and line vty passwords if the configuration file does not include enable and line vty commands to specify these passwords Telnet access and console access are both disabled 9 Comply with baseline privacy If baseline privacy is configured and enabled on both the router...

Страница 22: ... Flowchart Register with the Cisco uBR7246 Registration complete Power on Scan for downstream channel Obtain upstream parameters Upstream parameter acquired Start Ranging Ranging and auto adjust completed Establish IP connectivety IP complete Establish time of day Time of day established Establish security Transfer operational parameters Transfer complete Baseline privacy initialization Baseline p...

Страница 23: ... from privileged EXEC mode The most useful display fields in this output are the reported state changes These fields are preceded by the message CMAC_LOG_STATE_CHANGE These fields show how the Cisco uBR900 series progresses through the various processes involved in establishing communication and registration with the CMTS The normal operational state is maintenance_state the normal state when the ...

Страница 24: ...BAND 94 405000000 447000000 6000000 508144 372 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 95 123015000 129015000 6000000 508144 376 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 96 135012500 135012500 6000000 508144 380 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 97 141000000 171000000 6000000 508144 382 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 98 219000000 225000000 6000000 508144 386 CMAC_LOG_WILL_SEARCH_DS_FREQU...

Страница 25: ...C_LOG_TOD_COMPLETE 508177 160 CMAC_LOG_STATE_CHANGE security_association_state 508177 162 CMAC_LOG_SECURITY_BYPASSED 508177 164 CMAC_LOG_STATE_CHANGE configuration_file_state 508177 166 CMAC_LOG_LOADING_CONFIG_FILE platinum cm 508178 280 CMAC_LOG_CONFIG_FILE_PROCESS_COMPLETE 508178 300 CMAC_LOG_STATE_CHANGE registration_state 508178 302 CMAC_LOG_REG_REQ_MSG_QUEUED 508178 306 CMAC_LOG_REG_REQ_TRANS...

Страница 26: ...C_LOG_LINK_UP Event 2 Scan for a Downstream Channel then Synchronize Different geographical regions and different cable plants use different RF frequency bands A frequency band is a group of adjacent 6 MHz wide channels These bands are numbered from 88 to 99 Each band has starting and ending digital carrier frequencies and a 6 MHz step size For example a search of EIA channels 95 97 is specified u...

Страница 27: ...29015000 6000000 508144 376 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 96 135012500 135012500 6000000 508144 380 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 97 141000000 171000000 6000000 508144 382 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 98 219000000 225000000 6000000 508144 386 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 99 177000000 213000000 6000000 508144 390 CMAC_LOG_WILL_SEARCH_SAVED_DS_FREQUENCY 69900000...

Страница 28: ...he TFTP server s address the Time of Day TOD server s address and the name of a configuration file containing additional configuration parameters The CMAC_LOG_DHCP_COMPLETE field shows that the IP connectivity was successful 508175 968 CMAC_LOG_STATE_CHANGE dhcp_state 508176 982 CMAC_LOG_DHCP_ASSIGNED_IP_ADDRESS 188 188 1 62 508176 984 CMAC_LOG_DHCP_TFTP_SERVER_ADDRESS 4 0 0 1 508176 986 CMAC_LOG_...

Страница 29: ... that multiple SIDs are supported by the cable access router If several cable access routers use the same configuration file they will have the same CoS numbers but will be assigned different SIDs A successful registration is indicated by the CMAC_LOG_REGISTRATION_OK field 508178 300 CMAC_LOG_STATE_CHANGE registration_state 508178 302 CMAC_LOG_REG_REQ_MSG_QUEUED 508178 306 CMAC_LOG_REG_REQ_TRANSMI...

Страница 30: ...t be supported on the headend CMTS and it must be turned on in the configuration file that is downloaded to the cable access router Event 11 Enter the Maintenance State As soon as the Cisco uBR900 series has successfully completed the above events it enters the operational maintenance state and is authorized to forward traffic into the cable network 508178 322 CMAC_LOG_STATE_CHANGE maintenance_sta...

Страница 31: ...ies cable access router at a subscriber site contact your network administrator provisioning manager or billing system administrator to ensure remote configuration is allowed If remote configuration is disabled settings you make and save at the local site will not remain in effect after the cable access router is powered off and back on Instead settings will return to the previous configuration Re...

Страница 32: ...ses devices to be supported at subscriber sites Refer to Cisco s Network Registrar CNR product documentation The CMTS system administrator or appropriate personnel must define and push DHCP and Cisco uBR900 series configuration files to the appropriate servers such that each cable access router when initialized can transmit a DHCP request receive its IP address obtain its TFTP and TOD server addre...

Страница 33: ...es cable access router for VoIP over cable applications the following additional conditions must be met In order to run VoIP Fax the uBR900 series cable access router must be configured for voice and you must be using Cisco IOS Release 12 0 5 T or higher Supported MIBs and RFCs The Cisco uBR900 series cable access router supports the following categories of MIBs SNMP standard MIBs These are the MI...

Страница 34: ...on SMI for SNMPv2 as defined in RFC 1902 12 0 4 XI SNMPv2 TC my SNMPv2 TC V1SMI my Defines the textual conventions as specified in pages 4 10 11 of RFC 854 12 0 4 XI CISCO SMI my CISCO SMI V1SMI my Specifies the Structure of Management Information SMI for Cisco s enterprise MIBs 12 0 4 XI CISCO TC my CISCO TC V1SMI my Defines the textual conventions used in Cisco s enterprise MIBs 12 0 4 XI IF MIB...

Страница 35: ...ports statistics on the radio frequency transmissions over the cable television line Simple Gateway Control Protocol SGCP MIB Supports configuration performance and fault management of the SGCP interface The SGCP MIB components are as follows xgcplnBadVersions Number of incoming messages delivered to the protocol entity and that are for an unsupported protocol version xgcpRequestTimeOut Timeout va...

Страница 36: ...37 Configuring Ethernet and Cable Access Router Interfaces on page 38 Configuring Routing on page 39 Configuring Bridging on page 41 Reestablishing DOCSIS Compliant Bridging on page 43 Customizing the Cable Access Router Interface on page 44 Using Multiple PCs with the Cable Access Router on page 45 Caution Before attempting to reconfigure a Cisco uBR900 series cable access router at a subscriber ...

Страница 37: ...o config show running config Using 1888 out of 126968 bytes version XX X hostname cisco enable secret 5 1 60L4 X2JYOwoDc0 kqa1loO w8 Check the host name and encrypted password displayed near the top of the command output Step Command Purpose 1 uBR924 config hostname cisco cisco config Change the name of the uBR900 series to a meaningful name Substitute your host name for cisco 2 cisco config enabl...

Страница 38: ...assigned the correct IP address enter the show arp command uBR924 show arp Protocol Address Age min Hardware Addr Type Interface Internet 172 16 1 1 0009 0613 6030 ARPA cable modem0 Internet 4 0 0 28 00e0 1ed7 524d ARPA Ethernet0 Configuration Verification and Troubleshooting Tips If you are having trouble Make sure you are using the correct IP address Make sure the cable interface is not shut dow...

Страница 39: ...er 5 uBR924 config router network network number Specify the network connected to the cable access router on which the RIP process will operate If the cable access router is attached to more than one network enter each IP address in a separate command 6 uBR924 config router end uBR924 config interface cable modem0 Exit router configuration mode Return to interface configuration mode for the cable ...

Страница 40: ...ers service tcp small servers hostname uBR924 clock timezone 4 ip subnet zero voice port 0 voice port 1 interface Ethernet0 ip address 10 1 0 33 255 255 0 0 no ip directed broadcast ip rip send version 2 ip rip receive version 2 no keepalive interface cable modem0 ip address 172 16 1 42 255 255 0 0 no ip directed broadcast ip rip send version 2 ip rip receive version 2 no keepalive cable modem dow...

Страница 41: ...he Ethernet0 interface to a bridge group The bridge group must be an integer between 1 and 63 8 uBR924 config if bridge group bridge group spanning disabled Disable spanning tree on the Ethernet interface 9 uBR924 config if end uBR924 config interface cable modem0 Exit interface configuration mode for the Ethernet0 interface and enter interface configuration mode for the cable access router interf...

Страница 42: ...iguration Current configuration version 12 0 service config no service pad service timestamps debug uptime service timestamps log uptime no service password encryption hostname uBR924 clock timezone 4 ip subnet zero no ip routing voice port 0 voice port 1 interface Ethernet0 no ip address no ip directed broadcast no ip route cache bridge group 59 bridge group 59 spanning disabled 18 uBR924 config ...

Страница 43: ...button for less than 10 seconds For information on the location and operation of the Reset button refer to the Physical Description section in the chapter Installing the Cisco uBR924 Cable Access Router in the Cisco uBR924 Cable Access Router Installation and Configuration Guide Verifying DOCSIS Compliant Bridging To verify that the cable access router is configured for DOCSIS compliant bridging e...

Страница 44: ...the cable access router finds a successful downstream frequency channel it saves the channel and power setting to NVRAM The cable access router recalls this value the next time it needs to synchronize its frequency or register with the cable service provider s CMTS However you can customize the cable access router s interface configuration if you need to deviate from the default setting that ships...

Страница 45: ...cable host mac address reset command on the Cisco uBR7200 series router to remove the PC s MAC address from the router s internal address tables The PC s MAC address will be rediscovered and associated with the correct cable access router during the next DHCP lease cycle Power off the cable access router for approximately one minute and then power it back on so that the PC s MAC address will be re...

Страница 46: ...g Configuration The following Cisco uBR900 series cable access router configuration supports a typical residential Internet access data only subscriber Current configuration version 12 0 service config no service pad service timestamps debug uptime service timestamps log uptime no service password encryption hostname uBR924 clock timezone 4 ip subnet zero no ip routing voice port 0 voice port 1 in...

Страница 47: ...mand must be used In addition the bridge group 59 command must be removed from the Ethernet and cable modem interfaces Current configuration version 12 0 service config no service pad service timestamps debug uptime service timestamps log uptime no service password encryption hostname uBR924 clock timezone 4 ip subnet zero voice port 0 voice port 1 interface Ethernet0 ip address 10 1 0 33 255 255 ...

Страница 48: ...timestamps log uptime no service password encryption hostname uBR924 clock timezone 4 ip subnet zero ip multicast routing ip dvmrp route limit 20000 voice port 0 voice port 1 interface Ethernet0 ip address 24 1 0 1 255 255 0 0 no ip directed broadcast ip pim sparse dense mode no ip route cache no ip mroute cache interface cable modem0 ip address 10 1 0 25 255 255 0 0 no ip directed broadcast ip pi...

Страница 49: ... 2007 clock timezone 3 ip subnet zero no ip routing voice port 0 input gain 3 voice port 1 input gain 3 dial peer voice 1 pots destination pattern 6501 port 0 dial peer voice 2 pots destination pattern 6502 port 1 dial peer voice 62 voip destination pattern 620 session target ipv4 10 1 71 62 interface Ethernet0 ip address 10 1 71 65 255 255 255 0 no ip directed broadcast no ip route cache bridge g...

Страница 50: ...atch any clock timezone 3 ip subnet zero voice port 0 voice port 1 dial peer voice 1 pots destination pattern 6101 port 0 dial peer voice 2 pots destination pattern 6102 port 1 dial peer voice 101 voip destination pattern 620 codec g711alaw session target ipv4 10 1 71 62 interface Ethernet0 ip address 24 1 61 1 255 255 255 0 no ip directed broadcast no ip mroute cache interface cable modem0 ip add...

Страница 51: ...stamps log uptime no service password encryption hostname uBR924 ip nat inside source list 1 interface cable modem0 overload clock timezone 4 interface Ethernet0 ip address 10 1 1 1 255 255 255 0 ip nat inside interface cable modem0 ip address 24 3 90 20 255 255 255 0 ip nat outside no keepalive cable modem downstream saved channel 627000000 54 no cable modem compliant bridge ip default gateway 24...

Страница 52: ...0 call agen FQDN S 1 call agent FQDN Current configuration Last configuration change at 16 30 00 Thu Dec 16 1999 version 12 1 no service pad service timestamps debug uptime service timestamps log uptime no service password encryption hostname art1 clock timezone 0 6 ip subnet zero no ip routing ip domain name cisco com ip name server 4 0 0 32 sgcp xgcp snmp sgcp voice port 0 voice port 1 dial peer...

Страница 53: ...oftware images running at both the headend and the subscriber end must support the feature set Note Careful address assignment on user equipment and policy routing at the headend is required The headend may or may not use tunnels to convey traffic back to the corporate gateway For detailed information on IP security L2TP and Firewall refer to the Security Configuration Guide Current configuration ...

Страница 54: ...r rip version 2 network 10 0 0 0 network 24 0 0 0 ip classless no ip http server access list 100 permit ip host 10 1 0 25 30 1 1 0 0 0 0 255 line con 0 exec timeout 0 0 transport input none line vty 0 4 login end L2TP Configuration Note Encryption decryption is subject to export licensing controls To support L2TP and Firewall the Cisco uBR900 series must be configured in routing mode Software imag...

Страница 55: ... enable vpdn group 1 accept dialin l2tp virtual template 1 remote L2TP_LAC no l2tp tunnel authentication interface Ethernet0 ip address 80 1 1 1 255 255 255 0 no ip directed broadcast interface Virtual Template1 ip unnumbered Ethernet0 no ip directed broadcast peer default ip address pool dialup ppp authentication chap interface cable modem0 ip address 255 255 0 0 no ip directed broadcast cable mo...

Страница 56: ...s or in Voice over IP for the Cisco AS5300 which can be accessed online or on the Documentation CDROM by going to New Features in Cisco IOS Release 12 0 3 T All other commands used with this feature are documented in the Cisco IOS Release 12 0 command references In Cisco IOS Release 12 0 1 T or later you can search and filter the output for show and more commands This functionality is useful when ...

Страница 57: ...ion Command History Usage Guidelines It is normally not necessary to enter this command in data over cable bridging applications because DOCSIS compliant bridging is enabled by default If you wish to do full transparent bridging rather than DOCSIS compliant bridging use the no form of the command then configure full transparent bridging using CLI commands See the Configuring Bridging section on pa...

Страница 58: ...isco uBR900 series cable modem fast search Enables a faster downstream search algorithm on the cable interface of a Cisco uBR900 series cable modem upstream preamble qpsk Enables the QPSK modulation scheme in the upstream direction from the Cisco uBR900 series to the CMTS cable modem voip best effort Allows voice traffic to be transmitted on the upstream via best effort rather than by assigning it...

Страница 59: ...ssion These parameters are called up as the first downstream frequency and upstream power to use the next time the cable modem is booted This operation dramatically speeds up the channel search Use the no cable modem downstream saved channel ds frequency us power command to remove the saved frequency and power setting from the running configuration which will be resaved at the next initialization ...

Страница 60: ... cable modem fast search Enables a faster downstream search algorithm on the cable interface of a Cisco uBR900 series cable modem upstream preamble qpsk Enables the QPSK modulation scheme in the upstream direction from the Cisco uBR900 series to the CMTS cable modem voip best effort Allows voice traffic to be transmitted on the upstream via best effort rather than by assigning it a higher priority...

Страница 61: ... Guidelines This feature speeds up the frequency search performed by the cable access router Normally it takes the cable access router about 30 to 50 seconds to sample 30 to 50 frequencies The cable modem fast search command can reduce this search time However there might be some cases where this fast search algorithm might not perform as well as the default algorithm Trial and error is the only w...

Страница 62: ...ved channel Modifies the saved downstream channel setting and upstream power value on the cable interface of a Cisco uBR900 series cable modem upstream preamble qpsk Enables the QPSK modulation scheme in the upstream direction from the Cisco uBR900 series to the CMTS cable modem voip best effort Allows voice traffic to be transmitted on the upstream via best effort rather than by assigning it a hi...

Страница 63: ...modulation for the interface cable modem upstream preamble qpsk no cable modem upstream preamble qpsk Syntax Description This command has no arguments or keywords Defaults Enabled Command Modes Interface configuration Command History Usage Guidelines Examples The following example shows how to enter the cable modem upstream preamble qpsk command for a cable access router interface starting from gl...

Страница 64: ...em downstream saved channel Modifies the saved downstream channel setting and upstream power value on the cable interface of a Cisco uBR900 series cable modem fast search Enables a faster downstream search algorithm on the cable interface of a Cisco uBR900 series cable modem voip best effort Allows voice traffic to be transmitted on the upstream via best effort rather than by assigning it a higher...

Страница 65: ...igure the voice traffic on a Cisco uBR900 series to allow only calls having a high priority service identifier SID to be connected If the dynamic configuration of high priority queues for voice traffic fails or if the far end cannot support the multiple SIDs and multiple classes of service required by high priority traffic the flag set by this command will be checked If enabled the default setting...

Страница 66: ... cable modem downstream saved channel Modifies the saved downstream channel setting and upstream power value on the cable interface of a Cisco uBR900 series cable modem fast search Enables a faster downstream search algorithm on the cable interface of a Cisco uBR900 series cable modem upstream preamble qpsk Enables the QPSK modulation scheme in the upstream direction from the Cisco uBR900 series t...

Страница 67: ...l configuration mode to interface configuration mode Examples The following example brings up cable access router interface 0 and displays the available cable modem interface configuration commands uBR924 config interface cable modem 0 uBR924 config if cable modem compliant Enter compliant modes for interface downstream Downstream channel characteristics fast search Enable disable the DS fast sear...

Страница 68: ...nd upstream power value on the cable interface of a Cisco uBR900 series cable modem fast search Enables a faster downstream search algorithm on the cable interface of a Cisco uBR900 series cable modem upstream preamble qpsk Enables the QPSK modulation scheme in the upstream direction from the Cisco uBR900 series to the CMTS cable modem voip best effort Allows voice traffic to be transmitted on the...

Страница 69: ...ields shown in the display number The interface number of the cable interface on the rear panel of the Cisco uBR900 series Release Modification 11 3 NA This command was introduced Table 5 show bridge cable modem Field Descriptions Field Description Total of 300 station blocks Total number of forwarding database elements in the system The memory to hold bridge entries is allocated in blocks of memo...

Страница 70: ...T Related Commands Command Description show controllers cable modem Displays the current DHCP settings on point to point interfaces show interfaces cable modem Displays information about the cable interface on the Cisco uBR900 series cable access router ...

Страница 71: ...the receive receive MAC message buffer descriptor and packet descriptor rings Then comes MIB statistics from the BCM3300 chip DMA base registers to indicate where the rings start global control and status information and finally interrupts for the interrupt code When using this command be sure to check the tx_count and the tx_head and tx_tail values for the buffer descriptor TX BD and packet descr...

Страница 72: ... 0 04 pak 0x8325F28 buf 0x22480E status 0x80 pak_size 0 05 pak 0x8327CB0 buf 0x22B1C2 status 0x80 pak_size 0 06 pak 0x8323BB8 buf 0x21C936 status 0x80 pak_size 0 RX MAC message ring with 8 entries at 0x201E80 rx_head_mac 0x201E88 1 rx_p_mac 0x831BE80 1 00 pak 0x8326120 buf 0x224F1A status 0x80 pak_size 0 01 pak 0x8324590 buf 0x21EC72 status 0x80 pak_size 0 02 pak 0x8323FA8 buf 0x21D74E status 0x80...

Страница 73: ...0 ds_data_dma_ctrl 0x98 ds_mac_dma_ctrl 0xD8 ds_dma_data_index 0x0007 ds_dma_msg_index 0x0000 upstream dma us_bd_base 0x001FB8 us_pd_base 0x002038 us_dma_ctrl 0x80 us_dma_tx_start 0x00 Global control and status global_ctrl_status 0x00 interrupts irq_pend 0x0008 irq_mask 0x00F7 Table 6 briefly describes some of the fields shown in the display For more information see the Broadcom documentation for ...

Страница 74: ...server IP address of the security server at the headend Timezone Offset Correction received from the DHCP server to synchronize the Cisco uBR900 series time clock with the CMTS Config filename Name of the file stored on the cable company s TFTP server that contains operational parameters for the Cisco uBR900 series buffer size Size in bytes of the BCM3300 message buffers RX data PDU ring rx_head r...

Страница 75: ...e were no free data PDU buffer descriptors to accept the data Qualified maps Number of times a MAP message passed all filtering requirements and was received by the Cisco uBR900 series Qualified syncs Number of times a timestamp message was received by the Cisco uBR900 series CRC fails Number of times a MAC message failed a cyclic redundancy CRC check HDR chk fails Number of times a MAC header fai...

Страница 76: ...able modem filters Displays the registers in the MAC hardware that are used for filtering received frames show controllers cable modem lookup table Displays the mini slot lookup table inside a Cisco uBR900 series show controllers cable modem mac Displays detailed MAC layer information for a Cisco uBR900 series show controllers cable modem phy Displays the contents of the registers used in the down...

Страница 77: ...ode images that support baseline privacy and the privacy class of service is enabled via the configuration file that is downloaded to the cable access router Baseline privacy code images for the Cisco uBR900 series contain k1 in the code image name Examples The following output is displayed when the headend CMTS does not have baseline privacy enabled uBR924 show controllers cable modem 0 bpkm CM B...

Страница 78: ...current TEK is set to expire that the TEK grace timer begins signaling the TEK state machine to request a replacement key authorization rej wait time Number of seconds the Cisco uBR900 series waits before sending another Authorization Request message to the CMTS after it has received an Authorization Reject message kek state The current state of the key encryption key that the CMTS uses to encrypt...

Страница 79: ... show controllers cable modem 0 des downstream des ds_des_key_table key 0 even 0 odd 0 key 1 even 0 odd 0 key 2 even 0 odd 0 key 3 even 0 odd 0 ds_des_cbc_iv_table iv 0 even 0 odd 0 iv 1 even 0 odd 0 iv 2 even 0 odd 0 iv 3 even 0 odd 0 ds_des_sid_table sid_1 0x0000 sid_2 0x0000 sid_3 0x0000 sid_4 0x0000 ds_des_sid_enable 0x80 ds_des_ctrl 0x2E ds_des_sv 0x0F00 ds_unencrypted_length 0x0C upstream de...

Страница 80: ...tes that will be unencrypted at the beginning of the MAC frame 0x0C means the first 12 bytes are not encrypted which is what the DOCSIS Baseline Privacy specification calls for us_des_key_table Table showing upstream DES keys us_des_cbc_iv_table Table of upstream DES Cipher Block Chaining mode information us_des_ctrl Control register that controls the operating mode of the upstream DES engine The ...

Страница 81: ...trollers cable modem filters command in privileged EXEC mode show controllers cable modem number filters Syntax Description Defaults No default behavior or values Command Modes Privileged EXEC Command History Usage Guidelines Some of the filtering parameters are MAC hardware addresses Service IDs SIDs and upstream channel IDs number Controller number inside the Cisco uBR900 series Release Modifica...

Страница 82: ...mit 0x0001 us_sid_table sid_1 0x0000 sid_2 0x0000 sid_3 0x0000 sid_4 0x0000 max_re_req 0x0010 rang_fifo 0x00 Table 9 briefly describes some of the fields shown in the display For more information see the Broadcom documentation for the BCM3300 chip Table 9 show controllers cable modem filters Field Descriptions Field Description ds_mac_da_filters Shows the MAC address of the cable interface and the...

Страница 83: ...show controllers cable modem Displays high level controller information about a Cisco uBR900 series cable access router show controllers cable modem bpkm Displays information about the baseline privacy key management exchange between the Cisco uBR900 series and the CMTS show controllers cable modem des Displays information about the Data Encryption Standard DES engine registers show controllers ca...

Страница 84: ...eged EXEC Command History Usage Guidelines This command displays the details of the lookup table The driver uses this table to convert the size of the packets that the Cisco uBR900 series wants to transmit into a bandwidth request to the CMTS in mini slots The contents of this table are affected by the upstream symbol rate that is negotiated between the CMTS and the cable access router Use this ta...

Страница 85: ... 1F 1F 1F 1F 1F 1F 1F 170 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 180 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 190 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1A0 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1F 1B0 1F 1F 1F 1F 1F 1F 1F 1F 1F 2D 2D 2D 2D 2D 2D 2D 1C0 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 1D0 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 2D 1E0 2D 2D 2D 2...

Страница 86: ...5A 5A 5A 5A 5A 5A 5A 5A 68 68 68 68 68 68 68 530 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 540 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 550 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 560 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 570 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 580 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 68 590 68 68 68 68 68 68 68 68 68 68 68 68 68 ...

Страница 87: ...0 0DC0 0DC0 0E9C 0E9C 0E9C 0E9C Related Commands Command Description show controllers cable modem Displays high level controller information about a Cisco BR900 series cable access router show controllers cable modem bpkm Displays information about the baseline privacy key management exchange between the Cisco uBR900 series and the CMTS show controllers cable modem des Displays information about t...

Страница 88: ...will capture what happened For example if an address is not obtained from the DHCP server an error is logged initialization starts over and the Cisco uBR900 series scans for a downstream frequency The most useful keywords for troubleshooting a Cisco uBR900 series are log errors and resets See Example 1 Example 2 and Example 3 number Controller number inside the Cisco uBR900 series errors Optional ...

Страница 89: ... 00 14 24 864 344 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 96 121756000 169758400 6000300 00 14 24 864 348 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 97 217760800 397769800 6000300 00 14 24 864 354 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 98 73753600 115755700 6000300 00 14 24 864 358 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 99 403770100 997799800 6000300 00 14 24 864 364 CMAC_LOG_WILL_SEARCH_SAVED_DS_FREQU...

Страница 90: ...Q_QUEUED 16 00 14 34 874 768 CMAC_LOG_REGISTRATION_OK 00 14 34 874 770 CMAC_LOG_REG_RSP_ACK_MSG_QUEUED 0 00 14 34 874 774 CMAC_LOG_STATE_CHANGE establish_privacy_state 00 14 34 874 778 CMAC_LOG_PRIVACY_NOT_CONFIGURED 00 14 34 874 780 CMAC_LOG_STATE_CHANGE maintenance_state 00 14 34 874 784 CMAC_LOG_REG_RSP_ACK_MESSAGE_EVENT 00 14 34 874 788 CMAC_LOG_REG_RSP_ACK_MSG_SENT If the DHCP server cannot n...

Страница 91: ... was reset Reset messages and brief explanations are included in the following examples and in Table 10 however the reset messages in Table 10 do not commonly occur In the following example the configuration file downloaded from the TFTP server could not be read The file might not exist or the file might have incorrect permissions uBR924 show controllers cable modem 0 mac resets 62526 114 CMAC_LOG...

Страница 92: ...ATCHDOG_EXPIRED The Cisco uBR900 series was unable to transmit a response to a UCC REQ message CMAC_LOG_RESET_SECURITY_WATCHDOG_EXPIRED The full security exchange with the CMTS took too long CMAC_LOG_RESET_CONFIG_FILE_WATCHDOG_EXPIRED The TFTP server took too long to respond CMAC_LOG_RESET_ALL_FREQUENCIES_SEARCHED All downstream frequencies to be searched have been searched Note This message indic...

Страница 93: ...d values The required values are IP address network mask TFTP server IP address TOD server IP address DOCSIS configuration file name and time zone offset CMAC_LOG_RESET_CANT_START_DS_TUNER_PRCESS The Cisco uBR900 series was unable to start the internal process used to manage the downstream tuner CMAC_LOG_RESET_TOO_MANY_DS_LOCKS_LOST Downstream QAM FEC lock has been lost too many times CMAC_LOG_RES...

Страница 94: ... 11 pak 0x82DE884 buf 0x2246DA status 0x80 pak_size 0 12 pak 0x82DE68C buf 0x223FD2 status 0x80 pak_size 0 13 pak 0x82DE494 buf 0x2238CA status 0x80 pak_size 0 14 pak 0x82DE29C buf 0x2231C2 status 0x80 pak_size 0 15 pak 0x82DE0A4 buf 0x222ABA status 0x80 pak_size 0 16 pak 0x82DDEAC buf 0x2223B2 status 0x80 pak_size 0 17 pak 0x82DDCB4 buf 0x221CAA status 0x80 pak_size 0 18 pak 0x82DDABC buf 0x2215A...

Страница 95: ...FF FF 04 status 0x00 bd_index 0x0004 len 0x0000 hdr_len 0x0000 ehdr 00 00 00 2E 00 00 05 status 0x00 bd_index 0x0005 len 0x0000 hdr_len 0x0000 ehdr 00 00 00 2E 00 00 06 status 0x00 bd_index 0x0006 len 0x0000 hdr_len 0x0000 ehdr 00 00 00 00 00 00 07 status 0x20 bd_index 0x0007 len 0x0000 hdr_len 0x0000 ehdr 00 00 00 00 00 00 MIB Statistics DS fifo full 0 Rerequests 0 DS mac msg overruns 0 DS data o...

Страница 96: ... controllers cable modem MIB Statistics Field Descriptions Field Description DS fifo full Number of times the downstream receive buffer on the Cisco uBR900 series has become full Rerequests Number of registration requests sent by the Cisco uBR900 series to the CMTS DS mac msg overruns Number of times the DMA controller has had a downstream MAC message and there were no free MAC message buffer desc...

Страница 97: ... Rsp 0 T1 Timeouts 0 T2 Timeouts 0 T3 Timeouts 4 T4 Timeouts 0 Range Aborts 0 DS ID 1 DS Frequency 663000000 DS Symbol Rate 5056941 DS QAM Mode 64QAM DS Search 88 453000000 855000000 6000000 89 93000000 105000000 6000000 90 111250000 117250000 6000000 91 231012500 327012500 6000000 92 333015000 333015000 6000000 93 339012500 399012500 6000000 94 405000000 447000000 6000000 95 123015000 129015000 6...

Страница 98: ...gth 1 Scrambler on off 1 Burst Descriptor 2 Interval Usage Code 4 Modulation Type 1 Differential Encoding 2 Preamble Length 128 Preamble Value Offset 0 FEC Error Correction 5 FEC Codeword Info Bytes 34 Scrambler Seed 338 Maximum Burst Size 0 Guard Time Size 48 Last Codeword Length 1 Scrambler on off 1 Burst Descriptor 3 Interval Usage Code 5 Modulation Type 1 Differential Encoding 2 Preamble Lengt...

Страница 99: ...ost Number of times the Cisco uBR900 series lost synchronization with the downstream channel Invalid Maps Number of times the Cisco uBR900 series received invalid MAP messages Invalid UCDs Number of times the Cisco uBR900 series received invalid UCD messages Invalid Rng Rsp Number of times the Cisco uBR900 series received invalid ranging response messages Invalid Reg Rsp Number of times the Cisco ...

Страница 100: ... 1 by the CMTS whenever any of the values of this channel descriptor change If the value of this count in a sebsequent upstream channel descriptor UCD remains the same the Cisco uBR900 series can quickly decide that the remaining fields have not changed and may be able to disregard the remainder of the message Preamble Pattern Byte pattern used for the preamble Burst Descriptor Interval Usage Code...

Страница 101: ... process Op Wait Timeout Number of seconds the TEK state machine waits for a reply from the CMTS after sending its initial Key Request for its SID s keying material Retry Wait Timeout Number of seconds the TEK state machine waits for a replacement key for this SID after the TEK grace timer has expired and the request for a replacement key has been made TEK Grace Time Number of seconds before the c...

Страница 102: ... with operational parameters Time Zone Offset Correction received from the DHCP server to synchronize the Cisco uBR900 series time clock with the CMTS Command Description show controllers cable modem Displays high level controller information about a Cisco uBR900 series cable access router show controllers cable modem bpkm Displays information about the baseline privacy key management exchange bet...

Страница 103: ...m 0 phy receive BCM3116 Receiver Registers Chip ID C2C1 rstctl frzctl 20 qamctl 1B lmsctl 0B tpctl 00 fmtctl 24 ffectl 3F irqsts 09 irqmask 00 stoscm 9E rstctr 00 frzctl2 46 dvctl 30 idepth 55 eqlctl 00 tstctl 02 berctl 00 clkset 00 tunset 00 tunctl 03 FFC coefficient registers F0 0067FFBC F1 FF880080 F2 00C1FEFB F3 FF75019D F4 00C5FD89 F5 FF6D0485 F6 FC95F690 F7 2D280000 DFE coefficient registers...

Страница 104: ...init FFFFFF rs 343E fec 00 qam 01 pream_len 0018 offset 0000 burst config 1 prbs_init FFFFFE rs 033B fec 1C qam 65 pream_len 0000 offset 0000 burst config 2 prbs_init FFFFFE rs 033B fec 1D qam 65 pream_len 0000 offset 0000 burst config 3 prbs_init FFFFFE rs 033B fec 1E qam 65 burst config 4 prbs_init FFFFFE rs 033B fec 1F qam 65 pream_len 0000 offset 0000 burst config 5 prbs_init FFFFFE rs 033B fe...

Страница 105: ...eries and the CMTS show controllers cable modem des Displays information about the Data Encryption Standard DES engine registers show controllers cable modem filters Displays the registers in the MAC hardware that are used for filtering received frames show controllers cable modem lookup table Displays the mini slot lookup table inside a Cisco uBR900 series show controllers cable modem mac Display...

Страница 106: ... command Defaults No default behavior or values Command Modes Privileged EXEC Command History Examples Typical Cisco uBR900 series tuner settings are displayed in the following example See Table 13 for output field possibilities and descriptions uBR924 show controllers cable modem 0 tuner Tuner status 0x00 Rx tuner_freq 507000000 symbol_rate 5360736 local_freq 11520000 snr_estimate 17488 ber_estim...

Страница 107: ...d Use the show controllers cable modem 0 mac state command to see the power level in dBmV symbol_rate Indicates the upstream symbol rate in symbols per second that is negotiated between the CMTS and the cable access router Command Description show controllers cable modem Displays high level controller information about a Cisco uBR900 series cable access router show controllers cable modem bpkm Dis...

Страница 108: ...ess allocation Examples Following is sample output for the show dhcp lease command uBR924 show dhcp lease Temp IP addr 188 188 1 40 for peer on Interface cable modem0 Temp sub net mask 0 0 0 0 DHCP Lease server 4 0 0 32 state 3 Bound DHCP transaction id 2431 Lease 3600 secs Renewal 1800 secs Rebind 3150 secs Temp default gateway addr 188 188 1 1 Next timer fires after 00 58 01 Retry count 0 Client...

Страница 109: ...hich the leased IP address is valid the duration of the lease Renewal Time interval in seconds from address assignment until the client transitions to the renewing state When the renewal T1 time expires the client sends a unicast dhcprequest message to the server to extends its lease The default value of this timer is 0 5 times the duration of the lease Rebind Time interval in seconds from address...

Страница 110: ... configured for the server providing TFTP downloads to the cable modem TIME0 IP address of the primary Time of Day TOD server TIME1 IP address of the secondary Time of Day TOD server Subnet Subnet containing the DHCP server Command Description cable modem voip best effort Allows voice traffic to be transmitted on the upstream via best effort rather than by assigning it a higher priority class of s...

Страница 111: ...s Optional Shows MIB counters on the cable interface crb Optional Displays concurrent routing and bridging information for each interface that has been configured for routing or bridging This option does not really apply to the Cisco uBR900 series it is included because it is part of the subsystem that provides DOCSIS compliant bridging For more information refer to the Bridging and IBM Networking...

Страница 112: ...ons Field Description cable modem0 is up Indicates that the interface is currently active Disabled indicates the interface has received more than 5000 errors in one keepalive interval 10 seconds by default if keepalive is set administratively down indicates the interface has been taken down by an administrator line protocol is up Indicates that the software processes that handle the line protocol ...

Страница 113: ...ather than all network traffic The 5 minute input and output rates should be used only as an approximation of traffic per second during a given 5 minute period These rates are exponentially weighted averages with a time constant of 5 minutes A period of four time constants must pass before the average will be within two percent of the instantaneous rate of a uniform stream of traffic over that per...

Страница 114: ...er of times the transmitter has been running faster than the router can handle output errors Sum of all errors that prevented the final transmission of datagrams out of the interface being examined Note that this may not balance with the sum of the enumerated output errors as some datagrams might have more than one error and others might have errors that do not fall into any of the specifically ta...

Страница 115: ...losses 0 Pulse losses 1 BW request failures 6 Table 18 describes the counters shown in this display Table 17 show interfaces cable modem Accounting Descriptions Field Description Protocol List of protocols operating on the cable modem interface Pkts In Number of packets of each protocol received on the interface Chars In Number of bytes of each protocol received on the interface Pkts Out Number of...

Страница 116: ...edundancy CRC check Header CRC failures Number of times a MAC header failed its 16 bit CRC check The MAC header CRC is a 16 bit Header Check Sequence HCS field that ensures the integrity of the MAC header even in a collision environment Data PDUs Total number of data PDUs protocol data units of all types received by the Cisco uBR900 series DS MAC messages Number of MAC messages received by the Cis...

Страница 117: ...stream saved channel Modifies the saved downstream channel setting and upstream power value on the cable interface of a Cisco uBR900 series cable modem fast search Enables a faster downstream search algorithm on the cable interface of a Cisco uBR900 series show bridge cable modem Displays bridging information for a Cisco uBR900 series cable access router show interfaces cable modem Displays inform...

Страница 118: ... Documents section on page 31 for additional documents relating to troubleshooting The following debug commands are available to troubleshoot a Cisco uBR900 series cable access router debug cable modem bpkm debug cable modem bridge debug cable modem error debug cable modem interrupts debug cable modem mac debug cable modem map All commands relating to VoIP applications are documented in the Debug ...

Страница 119: ...loaded to the cable access router Baseline privacy code images for the Cisco uBR900 series contain k1 in the code image name Examples The following example shows debug output when the headend does not have privacy enabled uBR924 debug cable modem bpkm errors cm_bpkm_fsm machine KEK event state EVENT_4_TIMEOUT STATE_B_AUTH_WAIT new state STATE_B_AUTH_WAIT cm_bpkm_fsm machine KEK event state EVENT_4...

Страница 120: ...ries cable access router debug cable modem error Enables debugging messages for the cable interface driver on a Cisco uBR900 series debug cable modem interrupts Debugs Cisco uBR900 series interrupts debug cable modem mac Troubleshoots the Cisco uBR900 series MAC layer debug cable modem map Displays the timing from MAP messages to sync messages and the timing between MAP messages ...

Страница 121: ...ocol is completely up bridge table entries learned on the Ethernet interface program the cable MAC data filters The cable MAC hardware filters out any received packets whose addresses are not in the filters In this way the cable interface only receives packets addressed to its own MAC address or an address it has learned on the Ethernet interface Examples The following example shows sample display...

Страница 122: ...900 series debug cable modem error Enables debugging messages for the cable interface driver on a Cisco uBR900 series debug cable modem interrupts Debugs Cisco uBR900 series interrupts debug cable modem mac Troubleshoots the Cisco uBR900 series MAC layer debug cable modem map Displays the timing from MAP messages to sync messages and the timing between MAP messages ...

Страница 123: ... Guidelines This command displays detailed output about the sanity checking of received frame formats the acquisition of downstream QAM FEC lock the receipt or non receipt of SYNC messages from the CMTS reception errors and bandwidth request failures Examples The following example shows sample display output for the debug cable modem error privileged EXEC command uBR924 debug cable modem error Mar...

Страница 124: ...co uBR900 series debug cable modem bridge Debugs bridge filter processing information on a Cisco uBR900 series debug cable modem interrupts Debugs Cisco uBR900 series interrupts debug cable modem mac Troubleshoots the Cisco uBR900 series MAC layer debug cable modem map Displays the timing from MAP messages to sync messages and the timing between MAP messages ...

Страница 125: ...s command has no keywords or arguments Defaults No default behavior or values Command Modes Privileged EXEC Command History Examples The following example shows sample debug output for Cisco uBR900 series interrupts uBR924 debug cable modem interrupts BCM3300_rx_mac_msg_interrupt BCM3300_rx_mac_msg_interrupt BCM3300_tx_interrupt BCM3300_rx_mac_msg_interrupt BCM3300_tx_interrupt BCM3300_rx_mac_msg_...

Страница 126: ...debug cable modem bridge Debugs bridge filter processing information on a Cisco uBR900 series debug cable modem error Enables debugging messages for the cable interface driver on a Cisco uBR900 series debug cable modem mac Troubleshoots the Cisco uBR900 series MAC layer debug cable modem map Displays the timing from MAP messages to sync messages and the timing between MAP messages ...

Страница 127: ...rmation without entering debug mode enter the show controllers cable modem number mac log command The same information is displayed by both commands If the Cisco uBR900 series interface fails to come up or resets periodically the MAC log will show what happened For example if an address is not obtained from the DHCP server an error is logged initialization starts over and the Cisco uBR900 series s...

Страница 128: ...5 528308 470 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 96 135012500 135012500 6000000 Mar 7 01 43 05 528308 474 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 97 141000000 171000000 6000000 Mar 7 01 43 05 528308 478 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 98 219000000 225000000 6000000 Mar 7 01 43 05 528308 482 CMAC_LOG_WILL_SEARCH_DS_FREQUENCY_BAND 99 177000000 213000000 6000000 Mar 7 01 43 05 528308 486 CMA...

Страница 129: ..._TRANSMITTED 574654 024 CMAC_LOG_RNG_RSP_MSG_RCVD 574657 978 CMAC_LOG_WATCHDOG_TIMER 574664 094 CMAC_LOG_RNG_REQ_TRANSMITTED 574664 096 CMAC_LOG_RNG_RSP_MSG_RCVD 574674 164 CMAC_LOG_RNG_REQ_TRANSMITTED 574674 166 CMAC_LOG_RNG_RSP_MSG_RCVD uBR924 no debug cable mac log verbose Cable Modem mac log debugging is off uBR924 574684 234 CMAC_LOG_RNG_REQ_TRANSMITTED 574684 238 CMAC_LOG_RNG_RSP_MSG_RCVD Ex...

Страница 130: ...ID 1 Mar 7 01 44 06 Symbol Rate 8 Mar 7 01 44 06 Frequency 20000000 Mar 7 01 44 06 Preamble Pattern CC CC CC CC CC CC CC CC CC CC CC CC CC CC 0D 0D Mar 7 01 44 06 Burst Descriptor 0 Mar 7 01 44 06 Interval Usage Code 1 Mar 7 01 44 06 Modulation Type 1 QPSK Mar 7 01 44 06 Differential Encoding 2 OFF Mar 7 01 44 06 Preamble Length 64 Mar 7 01 44 06 Preamble Value Offset 56 Mar 7 01 44 06 FEC Error C...

Страница 131: ...4 06 MAC_PARM 0x02 Mar 7 01 44 06 LEN 0x42 Mar 7 01 44 06 EHDR 0x00 0x00 Mar 7 01 44 06 MAC MANAGEMENT MESSAGE HEADER Mar 7 01 44 06 DA 01E0 2F00 0001 Mar 7 01 44 17 RNG RSP MESSAGE Mar 7 01 44 17 Mar 7 01 44 17 FRAME HEADER Mar 7 01 44 17 FC 0xC2 MAC Management Mar 7 01 44 17 MAC_PARM 0x00 Mar 7 01 44 17 LEN 0x2B Mar 7 01 44 17 MAC MANAGEMENT MESSAGE HEADER Mar 7 01 44 17 DA 00F0 1EB2 BB61 Mar 7 ...

Страница 132: ...bug cable modem bridge Debugs bridge filter processing information on a Cisco uBR900 series debug cable modem error Enables debugging messages for the cable interface driver on a Cisco uBR900 series debug cable modem interrupts Debugs Cisco uBR900 series interrupts debug cable modem map Displays the timing from MAP messages to sync messages and the timing between MAP messages ...

Страница 133: ...nts Defaults No default behavior or values Command Modes Privileged EXEC Command History Examples The following example shows display output for the debug cable modem map privileged EXEC command uBR924 debug cable modem map Cable Modem MAP debugging is on uBR924 Mar 7 20 12 08 595322 942 Min MAP to sync 72 Mar 7 20 12 08 595322 944 Max map to map time is 40 Mar 7 20 12 08 595322 982 Min MAP to syn...

Страница 134: ...isco uBR900 series debug cable modem bridge Debugs bridge filter processing information on a Cisco uBR900 series debug cable modem error Enables debugging messages for the cable interface driver on a Cisco uBR900 series debug cable modem interrupts Debugs Cisco uBR900 series interrupts debug cable modem mac Troubleshoots the Cisco uBR900 series MAC layer ...

Страница 135: ...nnel A specific frequency allocation and bandwidth Downstream channels used for television are 6 MHz wide in the United States 8 MHz wide in Europe CM cable modem CMTS Cable Modem Termination System coaxial cable The principal physical media over which CATV systems are built CPE Customer Premises Equipment dB Decibel A measure of the relative strength of two signals dBm Decibels with respect to on...

Страница 136: ...graphic area thus having multiple headend facilities narrowband A single RF frequency NTSC National Television Systems Committee A United States TV technical standard named after the organization that created the standard in 1941 Specifies a 6 MHz wide modulated signal PAL Phase Alternating Line The TV system used in most of Europe in which the color carrier phase definition changes in alternate s...

Страница 137: ...ed to many purposes other than that of carrying TV signals This has resulted in an inadequate supply of spectrum to serve the needs of viewers Cable can reuse spectrum that is sealed in its aluminum tubes subscriber unit SU An alternate term for cable access router See cable access router upstream The set of frequencies used to send data from a subscriber to the headend ...

Страница 138: ...Glossary 138 Cisco IOS Release 12 0 7 T ...

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