[162190] in North American Network Operators' Group
Re: route for linx.net in Level3?
daemon@ATHENA.MIT.EDU (Leo Bicknell)
Fri Apr 5 09:14:21 2013
Date: Fri, 5 Apr 2013 06:14:01 -0700
From: Leo Bicknell <bicknell@ufp.org>
To: "'NANOG list'" <nanog@nanog.org>
Mail-Followup-To: 'NANOG list' <nanog@nanog.org>
In-Reply-To: <03f801ce31cf$c84a8000$58df8000$@swan.sk>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
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In a message written on Fri, Apr 05, 2013 at 09:32:52AM +0200, Adam Vitkovs=
ky 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 t=
hat
> it has to find an alternate next-hop.=20
> Though now with the advent of BGP PIC this is not an argument anymore.=20
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.
--=20
Leo Bicknell - bicknell@ufp.org - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
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