Cisco Systems uBR7200 Series manual Understanding Show Command Responses, General Show Commands

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Chapter 4 Troubleshooting the System

Understanding Show Command Responses

Monitoring and Maintaining Remote Querying

Use the following show commands to gather status information about the specified modems.

Command	Purpose
Router# show cable flap-list	Displays statistics on the quality of the modem
	connection.

Router# show cable modem	Displays statistics on modem states.

Router# show cable modem remote-query	Displays statistics gathered by SNMP agents on
	modem states.

Router# show interface cable

Displays statistics on the quality of the cable interface.

Router# show interface cable sid

Displays statistics on the service IDs of the speciﬁed modems.

Understanding Show Command Responses

General Show Commands

Key show commands include:

•show cable modem

•show interface cable

•show cable qos profile

•show cable modulation profile

•show cable spectrum-group

Additional or changed show commands using Cisco IOS Release 12.0(7)XR2,

Cisco IOS Release 12.1(1a)T1, or higher CMTS images include the following:

•The show cable qos command shows cable qos-profilen command, where the optional argument n can be used to display a specific profile.

•The show int cx/y sid command displays more complete Service ID (SID) status information.

•The show cable modem command displays a list of options for a single modem to be specified by entering either the RF CPE device's IP address or MAC address: SNR information for each cable modem on each interface, summary display of the total number of modems connected for each upstream channel, total number of registered and unregistered modems for the specified interface or upstream, total number of offline modems for the specified interface or upstream and status for each offline modem before it went offline.

•The show cable burst-profilecommand has been removed. Its functions have been incorporated into the show cable modulation-profilecommand, which now includes an added option number that displays the modulation profile number.

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

4-18	78-5897-01

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Contents Troubleshooting the System Configure Sync Message Interval Managing Cable Modems on the HFC NetworkActivate Cable Modem Upstream Address Verification Activate Cable Modem AuthenticationVerify Cable Modem Authentication Verify Sync Message IntervalCMTS01config-if#cable source-verify dhcp CMTS01config-if#no cable source-verifyVerify Cable Modem Upstream Address Verification CMTS01config-if#cable insertion-interval CMTS01config-if#no cable insertion-intervalCMTS01config-if#cable insertion-interval max AutomaticConfigure Per Modem Filters Configure access lists to be specified on a Configure Cable Modem Registration Timeout Clear Cable Modem ResetCMTS01config-if#cable registration-timeout n Verify Clear Cable Modem Reset Clear Cable Modem CountersConfigure Upstream Rate Limiting and Shaping Configure Traffic ShapingConfigure Downstream Rate Limiting and Shaping Verify Clear Cable Modem CountersToken-bucket CMTS01config-if#nocable upstream n1 rate-limitBlind Strategies and Time Scheduled Combined CMTS01# show interface c3/0 sid 1 countersGuided Frequency Hop Sample output Field DescriptionSpectrum Management Debug and Test Commands Show Cable Hop Command14 Show Cable Hop Parameter Descriptions Debug and Test Commands Polling Cable ModemsAllows you to conﬁgure access Enable SnmpConfigure Remote Modem Monitoring Verifying Remote Query InformationUnderstanding Show Command Responses General Show CommandsMonitoring and Maintaining Remote Querying Show Cable Modem See the sample command output below Page SID Show Cable Modem Maintenance Cable modem cable 3/0 upstream 0 unregisteredCable modem cable 3/0 upstream 0 offline UBR7200#show cable modem maintenance Show Interface CableMTU CRC Field Description Router# show interface cable 6/0 downstream18 Show Interface Cable Upstream Command Field Descriptions ATP Enhanced Show Interface Upstream Output Show Interface Cable SID Cable slot 3, portRouter# show interface c3/0 sid connectivity Router# show interface c3/0 sid counters verboseShow ConnectivityRouter# show interface c3/0 sid 1 counters Troubleshooting Using Cable Flap Lists Show Cable QoS ProfileUBR7200#show cable qos profile Page Page Display the Flap List UBR7200#show cable flapStatistic Description MAC IDPlant troubleshooting. The CRC counter indicates Troubleshoot with the Flap List Verify Cable Flap List Aging Set Cable Flap List AgingSet Cable Flap List Insertion Time Verify Cable Flap List Insertion TimeSet Cable Flap List Power Adjustment Threshold Verify Cable Flap List Power Adjustment ThresholdSet Cable Flap List Miss Threshold Verify Cable Flap List Miss Threshold Set Cable Flap List SizeClear Cable Flap List Verify Cable Flap List SizeCustomize Other Flap List Values and Related Commands Enable or Disable Power Adjustment Performing Amplitude AveragingSet Frequency Threshold to Affect Power Adjustment Syntax Valid ValuesSetting Downstream Test Signals Configure Unmodulated Test SignalsStep Command Purpose Step Command Configure Prbs Test SignalsVerify Test Signal Output Pinging Unresponsive Cable ModemsUsing Cable Interface Debug Commands Verify the PingDebug Cable ARP Requests Activate Debug of Baseline Privacy Debug Cable MAC Protocol ErrorsDebug Environmental Monitor Messages Debug Baseline Privacy ActivityDebug Cable PHY Messages Debug Cable MapsDebug Cable Modems Activate QoS DebugDebug Upstream Messages Debug Cable Modem Reset MessagesDebug Cable Modem Ranging Messages Debug Cable Modem Registration RequestsDebug Cmts Transmissions Debug Spectrum ManagementDebug Channel Allocations Debug Upstream Channel Change UCC MessagesClear Clock Counters Managing the Cisco uBR7246 VXR Clock CardDebug Upstream Channel Description UCD Messages Show diag Show frame-clocks Show tech support Show versionDisplay Clock Values Force Alternate ClockSet Midplane TDM Clock as Primary Reference Cable clock force primary secondary no cable clock forceRouter# show cable clock Show Clock Diagnostic InformationShow Clock Hardware Information and Register Values Show controllers clock-reference33 describes the fields shown in the show diag display Show Clock Frames Show General InformationRouter# show frame-clocks