Cisco Systems uBR7200 Series - page 13

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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

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Chapter4 Troubleshooting the System Managing Cable Modems on the HFC Network

Sample output:

noisy1#show cable spec

Group Frequency Upstream Weekly Scheduled Power Shared

No. Band Port Availability Level Spectrum

(Mhz) From Time: To Time: (dBmV)

1 10.000- 0.000 1 No

1 11.000- 0.000 1 No

1 12.000- 0.000 1 No

1 13.000- 0.000 1 No

1 14.000- 0.000 1 No

2 10.000-15.000 2 No

2 10.208 [0.40] Cable3/0 U1 2

3 20.000- 0.000 3 Yes

3 21.000- 0.000 3 Yes

3 22.000- 0.000 3 Yes

3 23.000- 0.000 3 Yes

3 24.000- 0.000 3 Yes

3 0.400 [0.80] Cable3/0 U2 3

4 20.000-25.000 4 Yes

4 20.800 [1.60] Cable3/0 U3 4

5 10.000- 0.000 5 No

5 11.000- 0.000 5 No

5 12.000- 0.000 5 No

5 13.000- 0.000 Mon 17:06:00 --- --:--:-- 5 No

5 14.000- 0.000 Mon 17:08:00 --- --:--:-- 5 No

5 13.000- 0.000 Mon 17:10:00 --- --:--:-- 5 No

5 1.600 [3.20] Cable3/0 U4 5

6 10.000-13.000 6 No

6 13.000-15.000 Mon 17:11:00 Mon 17:12:00 6 No

6 10.800 [1.60] Cable3/0 U5 0

Todisplay information about a specific interface or upstream port, enter the following command:show

cable hopcable-if [upstream portnum]. Information lines describe the frequency hop status of an

upstream port.

Table4-13 Show Cable Hop Parameter Descriptions

Field Description

Upstream Port The upstream port for this information line

Port Status Show “down” if frequency is unassigned, “admindown” if the port is

shutdown, or the center frequency of the channel if the port is up

Poll Rate The rate station maintenance polls are generated (msec)

Missed Poll Count The number of missing polls

Min Poll Sample The number of polls in the sample

Missed Poll Pcnt The ratio of missing polls to the number of polls displayed as a percentage

Hop Thres Pcnt Thelevel thatthe missed pollpercentage mustexceed totrigger afrequency

hop expressed as a percentage

Hop Period The maximum rate which frequency hopping will occur (seconds)

Corr FEC Errors The number of correctable FEC errors on this upstream port

Uncorr FEC Errors The number of uncorrectable FEC errors on this upstream port

Contents

Main CHAPTER Troubleshooting the System Using a Cable Modem at the Headend to Verify Downstream Signals Managing Cable Modems on the HFC Network Configure Sync Message Interval Verify Sync Message Interval Activate Cable Modem Authentication Verify Cable Modem Authentication Activate Cable Modem Upstream Address Verification Verify Cable Modem Upstream Address Verification Configure Dynamic Contention Algorithms (Cable Insertion Interval, Range, and Data Backoffs) Configure the Dynamic Map Advance Algorithm Configure Per Modem Filters Page Configure the Maximum Number of Hosts Attached to a Cable Modem Configure Cable Modem Registration Timeout Clear Cable Modem Reset Verify Clear Cable Modem Reset Clear Cable Modem Counters Verify Clear Cable Modem Counters Configure Traffic Shaping Configure Downstream Rate Limiting and Shaping Configure Upstream Rate Limiting and Shaping Configure Spectrum Management (without the Cisco MC16S Cable Modem Card) Blind Strategies and Time Scheduled Combined Guided Frequency Hop Page Spectrum Management Debug and Test Commands Show Cable Hop Command Page Debug and Test Commands Polling Cable Modems Enable SNMP Configure Remote Modem Monitoring Verifying Remote Query Information Monitoring and Maintaining Remote Querying Understanding Show Command Responses General Show Commands Show Cable Modem Page Page See the following sample for detailed output of theshow cable modem command: Show Cable Modem Maintenance Show Interface Cable Page Page Table4-18 describes the fields shown in the show interface cable upstreamdisplay. Field Description Page Page Enhanced Show Interface Upstream Output Show Interface Cable SID See the following display for the SIDs connected to the specified interface: See the following connection information for all SIDs on the specified interface: See the following connection information for SID 1 on the specified interface: Page Show Cable QoS Profile Troubleshooting Using Cable Flap Lists Page Page Display the Flap List Page Page Troubleshoot with the Flap List Set Cable Flap List Aging Verify Cable Flap List Aging Set Cable Flap List Insertion Time Verify Cable Flap List Insertion Time Set Cable Flap List Power Adjustment Threshold Verify Cable Flap List Power Adjustment Threshold Set Cable Flap List Miss Threshold Verify Cable Flap List Miss Threshold Set Cable Flap List Size Verify Cable Flap List Size Clear Cable Flap List Customize Other Flap List Values and Related Commands Performing Amplitude Averaging Enable or Disable Power Adjustment Set Frequency Threshold to Affect Power Adjustment Setting Downstream Test Signals Configure Unmodulated Test Signals Configure PRBS Test Signals Verify Test Signal Output Pinging Unresponsive Cable Modems Ping a Cable Modem Verify the Ping Using Cable Interface Debug Commands Debug Cable ARP Requests Debug Environmental Monitor Messages Debug Cable MAC Protocol Errors Activate Debug of Baseline Privacy Debug Baseline Privacy Activity Debug Cable MAC Messages Debug Cable Maps Debug Cable Modems Debug Cable PHY Messages Activate QoS Debug Debug Cable Modem Ranging Messages Debug Upstream Messages Debug Cable Modem Registration Requests Debug Cable Modem Reset Messages Debug Spectrum Management Debug Channel Allocations Debug CMTS Transmissions Debug Upstream Channel Change (UCC) Messages Debug Upstream Channel Description (UCD) Messages Managing the Cisco uBR7246 VXR Clock Card Clear Clock Counters Force Alternate Clock Set Midplane TDM Clock as Primary Reference Display Clock Values Show Clock Hardware Information and Register Values Show Clock Diagnostic Information Page Show Clock Frames Show General Information