MPLS MRU
The purpose of the MPLS MRU (Maximum Receive Unit) is to indicate the maximum size of a packet, including MPLS labels, that the local router router can forward without fragmenting. MRU is only locally significant. If an incoming packet belonging to a particular FEC (Forwarding Equivalence Class) exceeds the MRU calculated for that FEC, the packet will require fragmentation prior to it being transmitted on the outgoing interface. The MRU for each FEC varies depending on the MTU of the…