[51642] in North American Network Operators' Group
Re: AT&T NYC
daemon@ATHENA.MIT.EDU (Iljitsch van Beijnum)
Tue Sep 3 11:30:36 2002
Date: Tue, 3 Sep 2002 17:26:54 +0200 (CEST)
From: Iljitsch van Beijnum <iljitsch@muada.com>
To: Jesper Skriver <jesper@skriver.dk>
Cc: <nanog@merit.edu>
In-Reply-To: <20020903151802.GA15933@skriver.dk>
Errors-To: owner-nanog-outgoing@merit.edu
On Tue, 3 Sep 2002, Jesper Skriver wrote:
> > Links and loopbacks => IGP
> Why on earth does you want your link addresses in your IGP ?
> Sometimes it cannot be avoided, due to bad implementation, but why do
> you need it ?
Routers that learn a route over IBGP need to know where the next hop
address for route from other AS points to. Since this can't be a loopback
address and you typically don't run an IGP on subnets between border
routers in your AS and a remote AS, you need to either set next-hop-self
on all IBGP sessions or redistribute connected in your IGP.
Iljitsch van Beijnum
