Cisco Systems UBR924 manual Cmts to Cable Modem Network Topology

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List of Terms

CMTS to Cable Modem Network Topology

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

Cisco uBR924 cable access router.

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

Troubleshooting Tips for the Cisco uBR924 Cable Access Router 7

Image 7

Contents Restrictions BenefitsRelated Documents Related Features and TechnologiesRelated Documents If MIB MIB-II List of TermsList of Terms List of Terms Cmts to Cable Modem Network Topology Understand How Basic Initialization Works Troubleshooting Steps12960 Cmts Connect to the Cisco uBR924UBR924# show controllers cable-modem 0 mac log Display the Cisco uBR924’s MAC Log FileCmaclogadjusttxpower CmacloginitialrangingminislotsCmaclogpowerlevelis CmaclogadjustrangingoffsetCmaclognoprivacy Interpret the MAC Log File and Take ActionCmaclogregistrationok CmaclogregrspackmsgqueuedInterpret the MAC Log File and Take Action Event 3-Obtain Upstream Parameters Event 4-Start Ranging for Power AdjustmentsEvent 7-Establish Security CmaclogdhcperroracquiringsecsvraddrEvent 5-Establish IP Connectivity Event 6-Establish the Time of DayCmaclogbpkmrspmsgrcvd Event 10-Comply with Baseline PrivacyCmaclogprivacyfsmstatechange CmaclogbpkmreqtransmittedEvent 11-Enter the Maintenance State Use Additional Troubleshooting CommandsCommand Reference Show controllers cable-modem Show Controllers cable-modem ExamplesShow Controllers Cable-Modem Field Descriptions Show controllers cable-modem Cisco IOS Release 12.05T Related Commands UBR924# show controllers cable-modem 0 bpkm Show controllers cable-modem bpkmDescribes the fields shown in the display Related CommandsShow controllers cable-modem des UBR924# show controllers cable-modem 0 des downstream des DES engine registers are displayed in the following exampleRelated Commands Show controllers cable-modem filters Show Controllers Cable-Modem Filters Field Descriptions Show controllers cable-modem filters Show controllers cable-modem lookup-table Mini-slot lookup table is displayed in the following example Show controllers cable-modem lookup-table Related Commands Show controllers cable-modem mac ErrorsCmaclogallucdsfound CmaclogresetfromdriverExample CmaclogwillsearchdsfrequencybandCmaclogregrspackmessageevent CmaclogprivacynotconfiguredCmaclogwatchdogtimer CmaclogresetdhcpwatchdogexpiredCMACLOGRESETT4EXPIRED UBR924# show controllers cable-modem 0 mac resetsCmaclogresetprivacywatchdogexpired CmaclogresetconfigfileparsefailedCmaclogresetlossofsync CmaclogresettodwatchdogexpiredCmaclogresetdhcpfailed CmaclogresetservicenotavailableCMACLOGRESETT6RETRIESEXHAUSTED Cmaclogresetnetaccessmissing1600 Interrupts Burst profiles profile UBR924# show controller cable-modem 0 mac state Burst Descriptor Interval Usage Code Show Controllers Cable-Modem MAC State Field Descriptions US ID Show controllers cable-modem mac Related Commands D12=FFD3FFE0 Show controllers cable-modem phyD14=FFF3FFED = Fffffe = FfffffCC CC CC CC CC 0D 0D CC CC CC CC CC CC CC CC 0D Related Commands Show controllers cable-modem tuner Show controllers cable-modem Debug Commands Debug cable-modem bpkm UBR924# debug cable-modem bpkm errorsStatebauthwait Related Commands UBR924# debug cable-modem bridge Debug cable-modem bridgeRelated Commands Debug cable-modem error Debug cable-modem errorRelated Commands UBR924# debug cable-modem interrupts Debug cable-modem interruptsRelated Commands Debug cable-modem mac 014259 528302.046 Cmaclogdriverinitidbshutdown Debug cable-modem mac logCmaclogdriverinitidbshutdown UBR924# debug cable mac log verbose UBR924# debug cable mac logUBR924# debug cable-modem mac messages ? Debug cable mac messages Ehdr FixedQpsk OFFMar 014420 Debug cable-modem map Debug cable-modem mapRelated Commands