CCNP SP MPLS FAQ: MPLS VPN Q1. What is a route distinguisher? Answer: A route distinguisher is a 64-bit value—chosen by the service provider—that is appended to the IPv4 routes of the customer and makes the routes unique. Q2. How is a packet that is coming from the CE router identified as to which VRF it belongs? Answer: The packet is identified as belonging to a VRF by the … [Read more...]