Cisco Systems uBR7200 Series manual Show Cable Modem Maintenance

Page 23

Chapter 4 Troubleshooting the System

Understanding Show Command Responses

See the following sample output of unregistered modems connected on upstream channel 0 for cable interface 3, port 0:

router#show

cable modem cable 3/0 upstream 0 unregistered

 

Interface

Prim

Online

Timing

Rec

QoS CPE

IP address

MAC address

 

Sid

State

Offset

Power

 

 

 

 

Cable3/0/U0

1

offline

2264

-0.50

2

0

209.165.200.2

0090.8330.0214

Cable3/0/U0

2

offline

4137

!-3.50

2

0

209.165.200.9

0050.7366.17d3

Cable3/0/U0

3

init(d)

4136

!-2.75

2

0

209.165.200.0

0050.7366.17ab

Cable3/0/U0

4

init(d)

4137

!-3.25

2

0

209.165.200.0

0050.7366.1803

Cable3/0/U0

5

init(d)

4141

!-2.75

2

0

209.165.200.0

0050.7366.1801

Cable3/0/U0

6

offline

2251

-0.25

2

0

209.165.200.3

0090.8330.0213

Cable3/0/U0

7

offline

2254

-1.00

2

0

209.165.200.4

0090.8330.020f

Cable3/0/U0

8

offline

2248

0.00

2

0

209.165.200.5

0090.8330.0211

Cable3/0/U0

9

init(rc)

4665

-0.50

2

0

209.165.200.0

00d0.bad3.c459

See the following sample output of offline modems connected on upstream channel 0 for cable interface 3, port 0:

router#show

cable modem cable 3/0 upstream 0 offline

 

 

 

Interface

MAC address

Prim

Previous

Offline

Rx

Rx

SM

 

 

Sid

State

Time

 

Power

SNR

Exhaust

 

 

 

 

 

 

 

 

Count

Cable3/0/U0

0050.7366.17d3

2

init(o)

Jan 16 20:30:26 !-3.50

-----

1

Cable3/0/U0

0090.8330.0213

6

init(o)

Jan 16

20:30:55

-0.25

-----

181

Cable3/0/U0

0090.8330.020f

7

init(o)

Jan 16

20:31:07

-1.00

-----

181

Cable3/0/U0

0090.8330.0211

8

init(o)

Jan 16

20:31:23

0.00

-----

181

Show Cable Modem Maintenance

When a cable modem is detected to be offline by the CMTS—no reply after 16 retries of station maintenance requests—the cable modem is marked offline. Besides marking the cable modem and SID state offline, the SID is removed immediately from the CMTS ranging list and an aging timer is started to cleanup the SID completely if the cable modem does not attempt to come online within the next 24 hours.

Output fields are described below:

•The "SM Exhausted Count" value refers to the number of times a cable modem was dropped because it did not reply to station maintenance requests. A CM is removed from the station maintenance list after 16 times of periodic ranging opportunity without seeing the RNG_REQ from the modem.

•The "SM Aborted Count" value refers to the number of times the CM was dropped because its operational parameters were unacceptable. This includes such reasons as the power level is outside the acceptable range, or the timing offset keeps changing. The respective times in the command output indicate when this happened.

Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

 

78-5897-01

4-23

 

 

 

Page 22 Page 24
Image 23
Page 22 Page 24
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 VerificationVerify Cable Modem Upstream Address Verification CMTS01config-if#cable source-verify dhcpCMTS01config-if#no cable source-verify 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 CMTS01config-if#cable registration-timeout n Configure Cable Modem Registration TimeoutClear Cable Modem Reset 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 accessMonitoring 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 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 UBR7200#show cable qos profile Troubleshooting Using Cable Flap ListsShow 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 AgingSet Cable Flap List Miss Threshold Set Cable Flap List Power Adjustment ThresholdVerify Cable Flap List Power Adjustment 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 AdjustmentStep Command Purpose Setting Downstream Test SignalsConfigure Unmodulated Test Signals Pinging Unresponsive Cable Modems Configure Prbs Test SignalsVerify Test Signal Output Step CommandDebug Cable ARP Requests Using Cable Interface Debug CommandsVerify the Ping 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 Router# show frame-clocks Show Clock FramesShow General Information
Top Page Image Contents