Hi Mohammad,
I think you are looking for the following commands on your Cisco
device (if I have understood the problem correctly),
IOS:
interface x/y/z
mpls ldp discovery transport-address interface
IOS-XR:
mpls ldp
vrf ABC123
interface GigabitEthernet0/0/0/1
address-family ipv4
discovery transport-address interface
Cheers,
James.