Cisco Systems Cisco 12816 Manuale Utente

You can use the audio alarm cutoff switch to visually check that the alarm card 
indicators are operating properly. If no audible alarm is active, pressing the audio 
alarm cutoff switch temporarily lights all of the indicators on the alarm card front 
panel. If an indicator does not light it means that LED is faulty.

This section describes the procedures needed to troubleshoot problems with the 
switch fabric. The RP and the line cards connect through the crossbar switch 
fabric, which provides a high-speed physical path for most inter-card 
communication. Among the messages passed between the RP and the line cards 
over the switch fabric are, actual packets being routed and received, forwarding 
information, traffic statistics, and most management and control information. 
This information is useful in diagnosing hardware-related failures.

This section is recommended only for advanced Cisco IOS software operators and 
system administration personnel. Refer to the appropriate Cisco IOS software 
publications for detailed Cisco IOS information.

Use the following procedure to collect the needed data from the RPs and line cards 
in order to troubleshoot the switch fabric.

Enter the show controllers fia command for the primary and secondary RPs and 
save the output.

Enter the attach <slot #> command to access a line card.

Use the attach command when you connect to the line card. The 
execute-on command is dependent upon the inter-process communication 
(IPC) which operates over the switch fabric. If you are having problems 
with IPC, the commands that run remotely through the switch fabric can 
time out. The attach <slot #> command travels over the MBus and not the 
IPC.