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Cisco Systems UBR904 manual CMTS to Cable Modem Network Topology, Sample Topology

Models: UBR904

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CMTS to Cable Modem Network Topology

Figure 1 shows the physical relationship between the devices in the HFC network and the cable modem.

Figure 1 Sample Topology

	ISP	IP-related
	WAN
		ATM, FDDI, 100BT...

100BT

Proxy server

Cisco uBR7246

CMTS

Analog TV

100BT

100BT	ISP @ home...

100BT	MSD: Maintenance Service
	MSD: Maintenance Service
	Organization, Cable companies
Upconvertor

DS-RF 54-860 Mhz

Digital TV

Fiber

Transceiver

80 km

1000 ft

Fiber node (Telephone pole, underground box)

Distribution Top

amplifier amplifier

Drop box

13304

Cisco u BR904

cable modem

4Release 11.3(4)NA

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Cisco Systems UBR904 manual CMTS to Cable Modem Network Topology, Sample Topology

Contents

Benefits Feature SummaryTroubleshooting Tips for the Cisco uBR904 Cable Modem List of Terms Prerequisites Supported MIBs and RFCsProducts & Ordering Cisco Products Network Management CiscoWorks Cisco Product Documentation Network Management CiscoWorksCMTS to Cable Modem Network Topology CMTS to Cable Modem Network TopologyFigure 1 Sample Topology Troubleshooting Tips Understand How Basic Initialization WorksTroubleshooting Tips Figure 2 Cable Modem Initialization FlowchartConnect to the Cable Modem Connect to the Cable ModemCable Modem Initialization Sequences and Events SequenceDisplay the Cable Modem’s MAC Log File Troubleshooting Tips for the Cisco uBR904 Cable Modem Display the Cable Modem’s MAC Log FileInterpret the MAC Log File and Take Action Event 1-Wait for the Link to Come UpInterpret the MAC Log File and Take Action Event 4-Start Ranging for Power Adjustments Event 3-Obtain Upstream ParametersEvent 6-Establish the Time of Day Event 5-Establish IP ConnectivityEvent 7-Establish Security Event 8-Transfer Operational Parameters Event 9-Perform RegistrationEvent 10-Comply with Baseline Privacy 14 Release 11.34NAUse Additional Troubleshooting Commands Event 11-Enter the Maintenance StateCommand Reference show controller cable-modem show controller cable-modem bpkmshow controller cable-modem mac show controller cable-modem phy show controller cable-modem des show controller cable-modem filtersCommand Mode show controller cable-modemSyntax Description Usage GuidelinesRelated Commands 18 Release 11.34NAshow controller cable-modem bpkm show controller cable-modem number bpkmCommand Mode Related Commandsshow controller cable-modem des show controller cable-modem desCommand Mode Command ReferenceRelated Commands show controller cable-modemshow controller cable-modem des show controller cable-modem filters show controller cable-modem filtersCommand Mode Syntax Descriptionshow controller cable-modem bpkm show controller cable-modem des Related Commandsshow controller cable-modem show controller cable-modem filtersshow controller cable-modem lookup-table Command ModeSyntax Description Usage Guidelinesshow controller cable-modem Related Commandsshow controller cable-modem lookup-table errors debug cable mac log command is enteredresets show controller cable-modem macshow controller cable-modem mac Sample DisplayuBR904# show controller cable-modem 0 mac log Sample Display 28 Release 11.34NASample Displays The format of the DOCSIS configuration file acquiredMaintenance ranging opportunities for this modem are from the TFTP server is not acceptableCommand Reference Table 2 Possible but Uncommon Cable Interface Reset Causes ContinuedMessage DescriptionPossible but Uncommon Cable Interface Reset Causes Continued Sample DisplayMessage DescriptionCommand Reference 32 Release 11.34NAshow controller cable-modem mac Sample DisplayuBR904# show controller cable-modem 0 mac state Command Reference 34 Release 11.34NARelated Commands show controller cable-modemshow controller cable-modem tuner show interface cable-modem show controller cable-modem macshow controller cable-modem phy show controller cable-modem phy receive transmitreceive Command ModeRelated Commands Physical transmit registers are displayed in the following exampleshow controller cable-modem show controller cable-modem tuner show interface cable-modemshow controller cable-modem tuner show controller cable-modem tunerCommand Mode Related Commandsshow controller cable-modem tuner show interface cable-modem accountingcounters Command Modeshow controller cable-modem phy show controller cable-modem tuner Related CommandsMIB counters on the cable interface are displayed in the next example show controller cable-modemDebug Commands debug cable-modem error debug cable-modem interruptsdebug cable-modem bpkm debug cable-modem bridge debug cable-modem mac debug cable-modem mapno debug cable-modem bpkm errors events packets errorsDebugs cable modem privacy errors debug cable-modem bpkmDebug Commands Related Commands44 Release 11.34NA debug cable-modem bridge no debug cable-modem bridgeRelated Commands Usage Guidelinesdebug cable-modem error no debug cable-modem errorUse the the debug cable-modem for the cable interface driver. The Related Commandsdebug cable-modem interrupts no debug cable-modem interruptsRelated Commands Usage Guidelinesdebug cable-modem mac no debug cable-modem mac log verbose messagesRealtime MAC log display verboseSample Debug Cable-Modem Mac Log Output debug cable-modem macuBR904# debug cable-modem mac log 50 Release 11.34NA uBR904# debug cable mac loguBR904# debug cable mac log verbose debug cable mac messagesTroubleshooting Tips for the Cisco uBR904 Cable Modem debug cable-modem macDebug Commands Related Commands52 Release 11.34NA debug cable-modem map no debug cable-modem mapRelated Commands Usage GuidelinesModem Installation and Configuration Guide What to do NextWhat to do Next