Config example:
!
mpls label protocol ldp
mpls ldp loop-detection
mpls ip
mpls ldp discovery directed-hello accept
mpls ldp router-id Loopback0 force
!
int lo0
 ip address 10.100.10.10 255.255.255.255
!
!
int lo3
 ip address 10.100.100.3 255.255.255.255
!
int tun100
 ip vrf forwarding red
 ip address 10.10.0.1 255.255.255.0
 no ip redirects
 ip mtu 1400
 ip nhrp map multicast dynamic
 ip nhrp network-id 100
 ip ospf network broadcast
 ip ospf dead-interval minimal hello-multiplier 4
 tunnel source Loopback3
 tunnel mode gre multipoint
!
interface Port-channel30
 description ## 20GB Etherchannel Connection to --/--/-- ##
 ip address 10.160.10.1 255.255.255.252
 ip ospf dead-interval minimal hello-multiplier 4
  mpls ip
 !