Chapter 7. MPLS Troubleshooting

This chapter includes the following topics:

Previous chapters within this book discuss the theory of Multiprotocol Label Switching (MPLS) and its configuration on Cisco IOS Software and include a migration and configuration case study. This chapter focuses on the monitoring and troubleshooting aspects of MPLS.

MPLS is simple to configure and troubleshoot—few things can go wrong. Recent IOS versions (for example, IOS release 12.2) check most of the prerequisites for successful MPLS operation before they enable you to enter MPLS-related configuration commands.


MPLS is so transparent in simple IP networks that do not use advanced MPLS features (for example, ...

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