[c-nsp] same-router tunnel loopback

[Tim Durack]

>> (Maybe it's just the /127 - try with /124 or /64, just to be sure)

Tried a /112, same problem.

I wonder if the issue is recirculation. I already need "mls mpls
tunnel-recir" to support IPv4 traffic crossing the tunnel. Given that
IPv6 requires recirculation for regular forwarding, is there a limit
to the amount of recirc that can take place?

Perhaps I'm trying to do something weird that no one else has tried...

Tim:>