Troubleshooting guide

CHAPTER

3-1

ATM and Layer 3 Switch Router Troubleshooting Guide

OL-1969-01

Initial Troubleshooting

This chapter describes the first steps you should take when you start troubleshooting your switch router,

and contains the following sections:

• Online Diagnostics, page 3-1

• Checking DDTs Database and Release Notes for Workarounds, page 3-5

• Troubleshooting Hardware and Software Version Problems, page 3-7

• Troubleshooting Route Processor Redundancy (Catalyst 8540 CSR and Catalyst 8540 MSR), page

3-13

• Troubleshooting Switch Processor Redundancy with HSRP (Catalyst 8540 CSR and

Catalyst 8540 MSR), page 3-17

Online Diagnostics

This section describes the online diagnostics available for troubleshooting your switch router. Online

diagnostics provide the following types of tests:

• Processor Loopback Test (Catalyst 8540 CSR).

• Accessibility tests between the route processor and the interface modules and the route processor

and the switch processor.

• Online insertion and removal (OIR) diagnostic tests.

• Snake tests through the switch router to ensure connectivity between the ports.

The switch router displays an error message on the console when it detects a hardware failure or

problem.

Note Online diagnostic tests only run on the primary route processor.

Processor Loopback Test (Catalyst 8540 CSR)

The processor loopback test detects failures in the route processor to switch processor interface. The test

sends a packet from the route processor to each switch processor which then loops back to the route

processor. This test can run on the switch router without any port adapters or interface modules installed.