[c-nsp] IP LFA in ring topology

[Adam Vitkovsky]

> global labels would even allow us to get rid of LDP, by distributing
labels via ISIS
And that would be AWESOME, I didn't quite get the idea of creating other RIP
like protocols in favor of existing link-state protocols -same goes for PIM
vs ISIS
 

> But still, as long as the tunnels are created without operator, I guess
it's not too bad.
Right it's a great relief. Just one cmd and all the magic happens
automatically


adam