Huh. Weird. It looks like the Cisco Nexus 9k platform doesn't have a way to specifically set the MTU for MPLS packets either on an interface or globally - the only MTU commands I can find are just plain old default vrf regular packet size MTUs. The ASR let's me set an MTU just for MPLS on a per-interface basis, so, like: Interface TenMeg0/1/0/1 mtu 9000 mpls mtu 1538 But I don't see anything corresponding on the Nexus 9K. ¯\_(ツ)_/¯