Installation guide

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Cisco uBR7100 Series Universal Broadband Router Software Configuration Guide
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Chapter 5 Troubleshooting the System
Using Cable Interface debug Commands
Note See the Broadband Command Consolidation manual, available on Cisco.com and the documentation
CD-ROM, for more information on this feature and its commands.
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 Command
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 uBR7100 series router 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
debug cable envm Command (Environmental Monitor Messages)
This command activates debugging of the Cisco uBR7100 series environmental monitor. When this
command is activated, all environmental monitor messages are displayed on the Cisco uBR7100 series
router console. The format for the command follows:
CMTS01# debug cable envm
To deactivate debugging of the environmental monitor, use the following command:
CMTS01# no debug cable envm
Table 5-14 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.