Troubleshooting The Switch Fabric - Cisco 12416 Installation And Configuration Manual

Chapter 5 Troubleshooting the Installation
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Troubleshooting the Switch Fabric

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Step 1
Step 2
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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
Note
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.
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide

Troubleshooting the Switch Fabric

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