[j-nsp] Internet routes in MPLS network, global table or own VRF?

[Pavel Lunin]

> why would FRR LSP's take a route different than what the IGP would
> converge to.


Because FRR uses a path from a different entry (PLP) to probably a
different exit (say, next-next-hop). When normal LSP (either SPF or CSPF
calculated) is a path from head-end to tail-end. Whether this happens often
or rare, the need to care how your detours are calculated is itself a big
enough headache.

 > What the VRF-based Internet users will definitely notice is (looks like
> RAS
> > is tired of telling this story) is ICMP tunneling and consequent hard to
> > interpret delay values. People are very suspicious to the numbers. This
> is
> > almost impossible to explain, that the numbers, traceroute shows, have
> > nothing to do with their kitty-photos-not-loading problem.
>
> Hey kitty photos are serious business especially if you are facebook
> stalking the aforementioned kitty.
>

Absolutely. This is why in case of issues you should not waste time for
explaining why your core router is 200ms away from the previous hop.