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Troubleshooting Overview; Troubleshooting Basics - Cisco N5K-M1600 - Expansion Module - 6 Ports Troubleshooting Manual

Troubleshooting guide
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S e n d d o c u m e n t c o m m e n t s t o n e x u s 5 k - d o c f e e d b a c k @ c i s c o . c o m .

Troubleshooting Overview

This chapter introduces the basic concepts, methodology, and general troubleshooting guidelines for
problems that may occur when configuring and using the Cisco Nexus 5000 Series switch.
This chapter includes the following sections:

Troubleshooting Basics

The following are the basic steps for troubleshooting:
Gather information that defines the specific symptoms.
Step 1
Identify all potential problems that could be causing the symptoms.
Step 2
Step 3
Systematically eliminate each potential problem (from most likely to least likely) until the symptoms
disappear.
To identify the possible problems, you need to use a variety of tools and understand the overall
configuration.The following chapters in this guide describe many approaches and specific solutions to
potential problems.
Troubleshooting a Switch Crash
When a switch crashes, the cause might be from the failure of a process, and results in a reload of the
switch.
A crash is usually recorded with a core file on the switch and includes the reason for the crash, such as
a failed process. The following can help you determine the cause of the crash:
OL-25300-01
Troubleshooting Basics
Fabric Manager Tools and CLI Commands
Failover
Use the show version or show system reset-reason commands to display the reason for the crash.
switch# show system reset-reason
Please look at Note Details
1) At 4054 usecs after Sat Nov
Reason: Reset triggered due to HA policy of Reset
C H A P T E R
6 15:15:01 2010
Cisco Nexus 5000 Series Troubleshooting Guide
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