Hi- I have a need to connect 2 VRFs across two 9508s. Switches are connected via a L3 connection and can't be converted to L2 trunk. I was thinking about using GRE where tunnel is member of the VRF and uses default vrf to set up the tunnel. This isn't support on nexus, tunnel can't be part of one vrf and use a different vrf to reach tunnel destination
"Note - Configuring a GRE tunnel that uses a tunnel interface VRF that is different than the use-vrf for the tunnel destination is not supported. You need to use the same VRF for a tunnel interface and the tunnel destination"
What other options are available here. No MPLS supported on these. VxLAN seems too much work
you could use a new L3 sub-interface for each new VRF.
if i use lo0 on switch1 as the source of the tunnel and lo0 on switch2 as the destination, those loopbacks are in default vrf...so tunnel comes up fine but i need the tunnel to a member of a non default VRF.. i can't use interface that are in the default vrf as source and destinations for a tunnel which is in a different VRF..
if i use an interface from the non default VRF as source or destination, those have no reachability to each other so tunnel doesn't come up