Symptom
Below msg is seen on the console when MDT MTU is configued under mVRF.
"% Interface Tunnel1 does not support user settable ip mtu."
Conditions
Configure MDT MTU under mVRF
ak-tfobm-pe-asr920-1(config)#vrf definition v-00004-005
ak-tfobm-pe-asr920-1(config-vrf)# address-family ipv4
ak-tfobm-pe-asr920-1(config-vrf-af)#mdt mtu 1600
Further Problem Description
As MDT MTU is not configurable, user cannot pass payload > 1518 bytes through MVPN Tunnel
