What is the proper command to associate interface s0/0 with a VRF named my_vpn?
A.
Router (config-vrf)# int s0/0
B.
Router (config-if)# vrf my_vpn
C.
Router (config)# if vrf my_vpn int s0/0
D.
Router (config-if)# ip vrf forwarding my_vpn
Explanation:
After you define all relevant VRFs on the PE router, you must tell the PE router which interfaces belong to which VRF and, therefore, should populate the VRF with routes from connected sites. More than on interface can belong to the same VRF. You can do this by using the ip vrf forwarding interface-mode command, which associates the interface with the name VRF. Both main and sub-interfaces can be defined within a VRF. Reference: MPLS and VPN Architectures (Ciscopress) page 204