[192596] in North American Network Operators' Group
OSPF vs ISIS - Which do you prefer & why?
daemon@ATHENA.MIT.EDU (Michael Bullut)
Wed Nov 9 19:43:27 2016
X-Original-To: nanog@nanog.org
From: Michael Bullut <main@kipsang.com>
Date: Wed, 9 Nov 2016 20:12:24 +0300
To: nanog@nanog.org
Errors-To: nanog-bounces@nanog.org
Greetings Team,
=E2=80=8BWhile I haven't worked with IS-IS before but the only disadvantage=
I've
encountered with OSPF is that it is resource intensive on the router it is
running on which is why only one instance runs on any PE & P device on an
ISP network. OSPF is pretty good in handling the core network routing while
BGP & EGP handle the last-mile routing between PE & CE devices. BGP & EGP
can run on top of OSPF. I came across this *article*
<https://routingfreak.wordpress.com/2011/03/05/why-providers-still-prefer-i=
s-is-over-ospf-when-designing-large-flat-topologies/>
when
scrolling the web a while back and I still want to find out if am the only
one who thinks its a matter of choice between the two. Although there isn't
distinct 1:1 argument, it's good we discuss it here and figure out why one
prefer one over the other *(consider a huge flat network)**.* What say you
ladies and gentlemen?
Warm regards,
Michael Bullut.
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