Examining a CSPF Failure

Purpose

When a local CSPF failure indicates that no path meets the constraints configured for the LSP, you must perform CSPF-based tracing and be familiar with the contents of the traffic engineering database to resolve the problem. See Examine the Traffic Engineering Database for an analysis of the traffic engineering database.

NOTE: If an LSP does not establish immediately, wait at least a minute or so before taking diagnostic or corrective action. This is because the RSVP retry timer is set to a 30-second default, resulting in a slight delay before the correct state of the LSP is available.

Steps To Take

To examine a CSPF failure, follow these steps:

1. Verify the CSPF Failure
2. Examine the CSPF Log File
3. Examine the Traffic Engineering Database
4. Check the Administrative Group Configuration on R5