Cisco Systems uBR7200 Series manual Set Cable Flap List Size, Clear Cable Flap List

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Chapter 4 Troubleshooting the System

Troubleshooting Using Cable Flap Lists

Verify Cable Flap List Miss Threshold

To verify the cable flap list miss threshold, enter the show cable flap list command:

CMTS01# show cable flap list
Mac Addr	CableIF	Ins	Hit	Miss	CRC	P-Adj	Flap	Time
0010.7b6b.5d1d C3/0 U0		0	688	169	0	0	3	Nov 5	12:28:50
0010.7b6b.5e15 C3/0 U0		1	707	185	0	0	5	Nov 5	12:29:52
0010.7b6b.5e27 C3/0 U0		1	707	198	0	0	5	Nov 5	12:29:55
0010.7b6b.5d29 C3/0 U0		1	709	205	0	0	5	Nov 5	12:29:52
0010.7b6b.5e2b C3/0 U0		1	710	204	0	0	7	Nov 5	12:30:16

Set Cable Flap List Size

You can specify the maximum number of cable modems that can be listed in the cable flap list tables. The valid range is from 1 to 8192 cable modems. The default is 8192 cable modems.

To specify the maximum number of cable modems that can be recorded in the flap list, use the following command in global configuration mode.

Table 4-25 Instructions to Set Cable Flap List Size

Command	Purpose

CMTS01(config)# cable flap-list size number	Specify the maximum size of the flap list.

Verify Cable Flap List Size

To verify the cable flap list size, enter the show cable flap list command:

CMTS01# show cable flap list
Mac Addr	CableIF	Ins	Hit	Miss	CRC	P-Adj	Flap	Time
0010.7b6b.5d1d C3/0 U0		0	688	169	0	0	3	Nov 5	12:28:50
0010.7b6b.5e15 C3/0 U0		1	707	185	0	0	5	Nov 5	12:29:52
0010.7b6b.5e27 C3/0 U0		1	707	198	0	0	5	Nov 5	12:29:55
0010.7b6b.5d29 C3/0 U0		1	709	205	0	0	5	Nov 5	12:29:52
0010.7b6b.5e2b C3/0 U0		1	710	204	0	0	7	Nov 5	12:30:16

Clear Cable Flap List

To remove a single cable modem from the flap list or to remove all cable modems from the flap list, use one of the following commands in global configuration mode.

Table 4-26 Instructions to Clear Cable Flap List

Command	Purpose

CMTS01(config)# clear cable flap-list mac-addr	Clear the entries in the cable flap list for the cable
	modem with this MAC address.
CMTS01(config)# clear cable flap-list all	Clear the entries for all of the cable modems in the
	flap list.

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

	78-5897-01	4-43

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Contents Troubleshooting the System Managing Cable Modems on the HFC Network Configure Sync Message IntervalVerify Sync Message Interval Activate Cable Modem AuthenticationVerify Cable Modem Authentication Activate Cable Modem Upstream Address VerificationCMTS01config-if#no cable source-verify CMTS01config-if#cable source-verify dhcpVerify Cable Modem Upstream Address Verification Automatic CMTS01config-if#no cable insertion-intervalCMTS01config-if#cable insertion-interval max CMTS01config-if#cable insertion-intervalConfigure Per Modem Filters Configure access lists to be specified on a Clear Cable Modem Reset Configure Cable Modem Registration TimeoutCMTS01config-if#cable registration-timeout n Clear Cable Modem Counters Verify Clear Cable Modem ResetVerify Clear Cable Modem Counters Configure Traffic ShapingConfigure Downstream Rate Limiting and Shaping Configure Upstream Rate Limiting and ShapingCMTS01# show interface c3/0 sid 1 counters CMTS01config-if#nocable upstream n1 rate-limitBlind Strategies and Time Scheduled Combined Token-bucketGuided Frequency Hop Field Description Sample outputShow Cable Hop Command Spectrum Management Debug and Test Commands14 Show Cable Hop Parameter Descriptions Polling Cable Modems Debug and Test CommandsVerifying Remote Query Information Enable SnmpConfigure Remote Modem Monitoring Allows you to conﬁgure accessGeneral Show Commands Understanding Show Command ResponsesMonitoring and Maintaining Remote Querying Show Cable Modem See the sample command output below Page SID Cable modem cable 3/0 upstream 0 unregistered Show Cable Modem MaintenanceCable modem cable 3/0 upstream 0 offline Show Interface Cable UBR7200#show cable modem maintenanceMTU CRC Router# show interface cable 6/0 downstream Field Description18 Show Interface Cable Upstream Command Field Descriptions ATP Enhanced Show Interface Upstream Output Cable slot 3, port Show Interface Cable SIDConnectivity Router# show interface c3/0 sid counters verboseShow Router# show interface c3/0 sid connectivityRouter# show interface c3/0 sid 1 counters Show Cable QoS Profile Troubleshooting Using Cable Flap ListsUBR7200#show cable qos profile Page Page UBR7200#show cable flap Display the Flap ListMAC ID Statistic DescriptionPlant troubleshooting. The CRC counter indicates Troubleshoot with the Flap List Verify Cable Flap List Insertion Time Set Cable Flap List AgingSet Cable Flap List Insertion Time Verify Cable Flap List AgingVerify Cable Flap List Power Adjustment Threshold Set Cable Flap List Power Adjustment ThresholdSet Cable Flap List Miss Threshold Verify Cable Flap List Size Set Cable Flap List SizeClear Cable Flap List Verify Cable Flap List Miss ThresholdCustomize Other Flap List Values and Related Commands Performing Amplitude Averaging Enable or Disable Power AdjustmentSyntax Valid Values Set Frequency Threshold to Affect Power AdjustmentConfigure Unmodulated Test Signals Setting Downstream Test SignalsStep Command Purpose Pinging Unresponsive Cable Modems Configure Prbs Test SignalsVerify Test Signal Output Step CommandVerify the Ping Using Cable Interface Debug CommandsDebug Cable ARP Requests Debug Baseline Privacy Activity Debug Cable MAC Protocol ErrorsDebug Environmental Monitor Messages Activate Debug of Baseline PrivacyActivate QoS Debug Debug Cable MapsDebug Cable Modems Debug Cable PHY MessagesDebug Cable Modem Registration Requests Debug Cable Modem Reset MessagesDebug Cable Modem Ranging Messages Debug Upstream MessagesDebug Upstream Channel Change UCC Messages Debug Spectrum ManagementDebug Channel Allocations Debug Cmts TransmissionsShow diag Show frame-clocks Show tech support Show version Managing the Cisco uBR7246 VXR Clock CardDebug Upstream Channel Description UCD Messages Clear Clock CountersCable clock force primary secondary no cable clock force Force Alternate ClockSet Midplane TDM Clock as Primary Reference Display Clock ValuesShow controllers clock-reference Show Clock Diagnostic InformationShow Clock Hardware Information and Register Values Router# show cable clock33 describes the fields shown in the show diag display Show General Information Show Clock FramesRouter# show frame-clocks