In a message written on Fri, Apr 05, 2013 at 09:32:52AM +0200, Adam Vitkovsky wrote: > I thought people where doing it because IGP converged faster than iBGP and > in case of an external link failure the ingress PE was informed via IGP that > it has to find an alternate next-hop. > Though now with the advent of BGP PIC this is not an argument anymore.
You're talking about stuff that's all 7-10 years after the decisions
were made that I described in my previous e-mail. Tag switching
(now MPLS) had not yet been invented/deployed when the first
"next-hop-self" wave occured it was all about scaling both the IGP
and BGP.
In some MPLS topologies it may speed re-routing to have edge interfaces
in the IGP due to the faster convergence of IGP's. YMMV, Batteries not
Included, Some Assembly Required.
--
Leo Bicknell - bickn...@ufp.org - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
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