Troubleshooting Link Protection for Multiple Bypass LSPs Overview

This case study simulates a network problem with link protection for multiple bypass paths for Resource Reservation Protocol (RSVP)-signaled LSPs (LSPs). It includes a brief summary of link protection, an example network scenario, and commands to troubleshoot and resolve the problem. (See Table 10.)

The troubleshooting process described in this case study should not be followed rigidly; it is a basis from which you can develop your own process to suit your particular situation.

Table 10: Troubleshooting Link Protection for Multiple Bypass LSPs Checklist

Troubleshooting Tasks	Command or Action
Troubleshooting Link Protection for Multiple Bypass LSPs
Symptom	One bypass LSP is pre-signaled instead of two. show mpls lsp bypass
Cause	The bandwidth reserved on the primary LSP is served by only one bypass path.
Troubleshooting Commands	show mpls lsp show mpls lsp bypass extensive show rsvp session ingress detail show rsvp interface show rsvp interface type-fpc/pic/port extensive show configuration statement-path
Solution	show configuration statement-path show mpls lsp bypass show mpls lsp bypass extensive
Conclusion	Multiple bypass paths are pre-signaled when the bandwidth values in the configuration require multiple bypass paths.
Router Configurations	show configuration | no-more