Configuring and Troubleshooting Interfaces
For additional configuration examples, refer to the appropriate Cisco IOS software configuration
publications listed in the
Advanced Line Card Troubleshooting
This section provides advanced troubleshooting information in the event of a line card failure. It also
provides pointers for identifying whether or not the failure is hardware related. This section does not
include any software-related failures, except for those that are often mistaken for hardware failures.
This section assumes that you possess basic proficiency in the use of Cisco IOS software commands.
By reading this section and by following the troubleshooting steps, you should be able to determine the
nature of the problems you are having with your line card. The first step is to identify the cause of the
line card failure or console errors that you are seeing. To discover which card may be at fault, it is
essential to collect the output from the following commands:
Along with these show commands, you should also gather the following information:
It is important to collect the show tech-support data before doing a reload or power cycle. Failure to do
so can cause all information about the problem to be lost.
Output from these commands will vary slightly depending on which line card you are using, but the basic
information will be the same.
The following are examples of system output that you may see if your Cisco 12000 series router line card
fails. Key data in the output is underlined.
ATM Line Card Installation and Configuration
"Important Information" section on page
show context summary
show logging summary
show diag slot
show context slot slot
Console Logs and Syslog Information—This information is crucial if multiple symptoms are
occurring. If the router is configured to send logs to a Syslog server, you may see some information
on what has occurred. For console logs, it is best to be directly connected to the router on the console
port with logging enabled.
Additional Data—The show tech-support command is a compilation of many different commands,
including show version, show running-config, and show stacks. This information is required when
working on issues with the Cisco Technical Assistance Center (TAC).
show context summary Output
show logging Output
show diag slot Output