For a PE to VRF remote ping, which is also known as a VRF-aware ping, MPLS Manager traces the topology to determine which VRF on the source PE to use to exchange routes with the destination VRF.

In VRF-aware remote ping, for example, when MPLS Manager initiates a PE2 to VRF1 remote ping, MPLS Manager determines that VRF4 exchanges routes with VRF1. Accordingly, MPLS Manager includes the VRF4 name as a parameter in the remote ping requests that it sends to PE2.

Figure 1. VRF-aware remote ping

For a PE to VRF remote ping, MPLS Manager instructs the source PE to ping all the IP addresses of the underlying interfaces that are associated with the destination VRF.