CCIE SP MPLS FAQ: MPLS VPN Troubleshooting Figure: Sample MPLS VPN Network Q1. What are the common errors that occur in an MPLS VPN network that are not a result of MPLS VPN design or configuration error? Answer: The common errors, apart from the users reporting a network error when something else is broken, are MPLS MTU issues in the core of the MPLS backbone and … [Read more...]