Cisco Systems uBR7200 Series Configure Cable Modem Registration Timeout, Clear Cable Modem Reset

Page 8

Chapter 4 Troubleshooting the System

Managing Cable Modems on the HFC Network

Configure the Maximum Number of Hosts Attached to a Cable Modem

To specify the maximum number of hosts that can be attached to a subscriber’s cable modem, use the following command in cable interface configuration mode.

Table 4-7 Instructions to Configure the Maximum Number of Hosts Attached to a Cable Modem

Command

Purpose

 

 

CMTS01(config-if)# cable max-hostsn

Specify the maximum number of hosts that can be

 

attached to a cable modem on this interface. Valid

 

range is from 0 to 255 hosts. Default = 0.

CMTS01(config-if)# no cable max-hosts

Reset the allowable number of hosts attached to a

 

cable modem to the default value of 0 hosts.

 

 

Configure Cable Modem Registration Timeout

By default, registered cable modems that have no upstream activity for three minutes are timed out and disconnected from the Cisco uBR7200 series. This timeout interval can be decreased to 2 minutes or increased up to 60 minutes.

To specify the registration timeout interval for cable modems connected to the Cisco uBR7200 series, use the following command in cable interface configuration mode.

Table 4-8

Instructions to Configure Cable Modem Registration Timeout

 

 

 

 

Command

 

Purpose

 

 

CMTS01(config-if)#cable registration-timeout n

Specify the maximum number of minutes allowed to

 

 

elapse with no upstream activity before terminating

 

 

the connection. Valid range is from 2 to 60 minutes.

 

 

Default = 3 minutes.

 

 

 

Clear Cable Modem Reset

To remove a single cable modem (or all cable modems) from the station maintenance list and reset the cable modem (or all cable modems) on the network, use one of the following commands in cable interface configuration mode.

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

4-8

78-5897-01

 

 

Image 8
Contents Troubleshooting the System Configure Sync Message Interval Managing Cable Modems on the HFC NetworkActivate Cable Modem Authentication Verify Cable Modem AuthenticationActivate Cable Modem Upstream Address Verification Verify Sync Message IntervalVerify Cable Modem Upstream Address Verification CMTS01config-if#cable source-verify dhcpCMTS01config-if#no cable source-verify CMTS01config-if#no cable insertion-interval CMTS01config-if#cable insertion-interval maxCMTS01config-if#cable insertion-interval AutomaticConfigure Per Modem Filters Configure access lists to be specified on a CMTS01config-if#cable registration-timeout n Configure Cable Modem Registration TimeoutClear Cable Modem Reset Verify Clear Cable Modem Reset Clear Cable Modem CountersConfigure Traffic Shaping Configure Downstream Rate Limiting and ShapingConfigure Upstream Rate Limiting and Shaping Verify Clear Cable Modem CountersCMTS01config-if#nocable upstream n1 rate-limit Blind Strategies and Time Scheduled CombinedToken-bucket 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 ModemsEnable Snmp Configure Remote Modem MonitoringAllows you to configure access Verifying Remote Query InformationMonitoring and Maintaining Remote Querying Understanding Show Command ResponsesGeneral Show Commands Show Cable Modem See the sample command output below Page SID Cable modem cable 3/0 upstream 0 offline Show Cable Modem MaintenanceCable modem cable 3/0 upstream 0 unregistered 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 counters verbose ShowRouter# show interface c3/0 sid connectivity ConnectivityRouter# show interface c3/0 sid 1 counters UBR7200#show cable qos profile Troubleshooting Using Cable Flap ListsShow 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 Set Cable Flap List Aging Set Cable Flap List Insertion TimeVerify Cable Flap List Aging Verify Cable Flap List Insertion TimeSet Cable Flap List Miss Threshold Set Cable Flap List Power Adjustment ThresholdVerify Cable Flap List Power Adjustment Threshold Set Cable Flap List Size Clear Cable Flap ListVerify Cable Flap List Miss Threshold 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 ValuesStep Command Purpose Setting Downstream Test SignalsConfigure Unmodulated Test Signals Configure Prbs Test Signals Verify Test Signal OutputStep Command Pinging Unresponsive Cable ModemsDebug Cable ARP Requests Using Cable Interface Debug CommandsVerify the Ping Debug Cable MAC Protocol Errors Debug Environmental Monitor MessagesActivate Debug of Baseline Privacy Debug Baseline Privacy ActivityDebug Cable Maps Debug Cable ModemsDebug Cable PHY Messages Activate QoS DebugDebug Cable Modem Reset Messages Debug Cable Modem Ranging MessagesDebug Upstream Messages Debug Cable Modem Registration RequestsDebug Spectrum Management Debug Channel AllocationsDebug Cmts Transmissions Debug Upstream Channel Change UCC MessagesManaging the Cisco uBR7246 VXR Clock Card Debug Upstream Channel Description UCD MessagesClear Clock Counters Show diag Show frame-clocks Show tech support Show versionForce Alternate Clock Set Midplane TDM Clock as Primary ReferenceDisplay Clock Values Cable clock force primary secondary no cable clock forceShow Clock Diagnostic Information Show Clock Hardware Information and Register ValuesRouter# show cable clock Show controllers clock-reference33 describes the fields shown in the show diag display Router# show frame-clocks Show Clock FramesShow General Information