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Cisco IOS XR Troubleshooting Guide for the Cisco CRS-1 Router
OL-21483-02
Preface
This guide describes how to troubleshooting a router using the Cisco IOS XR software.
This preface contains the following sections:
• Changes to This Document, page vii
• Obtaining Documentation and Submitting a Service Request, page viii
Changes to This Document
Table 1 lists the technical changes made to this document since it was first issued.
Table 1 Changes to This Document
Revision Date Change Summary
OL-21483-02 October,
2010
Added information about the following topics:
• Chapter 1—Added links to information on SNMP timeouts and the MIBs download site.
• Chapter 1—Added a list of commands to use to gather information prior to contacting TAC.
• Chapter 4—Added a drawing of the fabric architecture.
• Chapter 4—Added information about using online diagnostics to help troubleshoot fabric.
• Chapter 4—Added the CLI command show controllers fabric link health.
• Chapter 4—Added information about using the correct fiber cleaning kit and procedure.
• Chapter 4—Added a section with guidelines on maintenance of fabric links.
Continued, next page
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