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debug ipc errors

Cisco 12000 Series Gigabit Switch Routers 69

debug ipc errors

To enable warnings and errors from the Interprocess Communications (IPC) on the line card or

Gigabit Route Processor (GRP), use the debug ipc errors EXEC command. Use the no form of the

command to disable debugging output.

[no] debug ipc errors

Usage Guidelines

This command ﬁrst appeared in Cisco IOS Release 11.2 GS.

Use the debug ipc errors command if you observe IPC error messages or IPC timeout messages and

the error counters are increasing when you use the show ipc statistics command.

Caution On the GRP, if there are a lot of IPC timeout error messages or messages such as Unicast

send timeout, verify other statistics with the show controller csar and show controller ﬁa command

to further diagnose the problem before enabling the debug ipc errors command.

To use the debug ipc errors on a line card, use the if-con slot-number or exec slot slot-number

command. It is safer to use the if-con command rather than the exec slot command to enable the

debug ipc errors command on a line card. If there are IPC problems between the GRP and the line

card, the exec slot command might fail or wait a long time for the line card to respond.

Caution On the line card, before enabling the debug ipc errors command, use the show ip

statistics command. If the error counters in the show ipc statistics command increase at a fast rate,

enabling the debug ipc errors command might generate a lot of output. Too many log messages

from the line card might cause the messages to get dropped over the MBus. In this case, it might be

useful to use the show controller frfab queues command and check whether the number of

elements in the non-IPC free queues or IPC queue is zero. If the number of elements in the non-IPC

free queues or IPC queue is zero, it could indicate that the buffers are exhausted.

Sample Display

Figure 2 shows sample output from the debug ipc errors command.

Figure 2 Sample Debug IPC Errors Output

router# debug ipc errors

IPC: Failed opening master port

Table 8 lists the possible messages that could be generated by this command.

1 2 ... 52 53 54 55 56 57 58 59 60

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