Chapter 4 Troubleshooting the Installation
Troubleshooting Overview
Troubleshooting Overview
This section describes the methods used in troubleshooting the router. The troubleshooting methods are organized according to the major subsystems in the router.
If you are unable to solve a problem on your own, you can contact a Cisco customer service representative for assistance. When you call, have the following information ready:
•Date you received the router and the chassis serial number (located on a label on the back of the chassis).
•Installed line cards.
–Use the show hardware command to determine which line cards are installed if possible.
•Cisco software release number.
–Use the show version command to determine this information if possible.
•Brief description of the symptoms and steps you have taken to isolate and solve the issue.
•Maintenance agreement or warranty information.
Troubleshooting Using a Subsystem Approach
To solve a system problem, try to isolate the problem to a specific subsystem. Compare current router behavior with expected router behavior. Because a startup issue is usually attributable to one component, it is most efficient to examine each subsystem, rather than trying to troubleshoot each router component.
For troubleshooting purposes in this chapter, the router consists of the following subsystems:
•Power
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