Chapter 13. Troubleshooting MPLS Networks

What You Will Learn

By the end of this chapter, you should know and be able to do the following:

  • Know how many labels to expect on a packet at a particular link in any MPLS network

  • Use the traceroute tool in Cisco IOS to help determine problems with the forwarding of MPLS packets

  • Solve a typical MPLS MTU problem

  • Explain the propagation of the Time To Live (TTL) value by labeled packets

  • Tackle a problem with load balancing labeled packets

  • Explain what the command mpls ip propagate-ttl does and what its typical use is

  • Use MPLS-aware Netflow to better troubleshoot MPLS forwarding problems

When you are able to do these, you are ready to troubleshoot MPLS problems in a proper and efficient manner.

To troubleshoot ...

Get MPLS Fundamentals now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial