Cisco Systems uBR7200 Series Instrukcja Naprawy Pobierz pdf (Strona 49)

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Cisco uBR7200 Series Universal Broadband Router Software Configuration Guide

78-5897-01

Chapter 4 Troubleshooting the System

Using Cable Interface Debug Commands

Verify the Ping

The ping docsis command returns a verification from a cable modem that is pinged:

Queueing 5 MAC-layer station maintenance intervals, timeout is 25 msec:

!!!!!

Success rate is 100 percent (5/5)

Tips If you are having trouble, make sure you are using a valid MAC or IP address for the

cable modem you want to ping.

Using Cable Interface Debug Commands

To troubleshoot cable interfaces, use the following debug commands in enable (privileged EXEC)

mode.

Caution The following commands can generate large amounts of output as the number of

cable modems grows. On heavily loaded systems with thousands of cable modems, these

commands can dramatically affect router performance.

Debug Cable ARP Requests

This command activates debugging of arp requests on the cable interfaces. When this command is

activated, all cable arp request messages are displayed on the Cisco uBR7200 series console. The

format for the command follows:

CMTS01# debug cable arp

To deactivate debugging of arp requests, use the following command:

CMTS01# no debug cable arp

Table 4-32 Instructions to Use Debug Command

Command Purpose

CMTS01# debug cable ?

View all debug cable commands that are available.

CMTS01# undebug all

Turn off all debugging information to the console

and choose a more selective debug command.

Note Refer to the debug commands

that follow.

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