[107137] in North American Network Operators' Group
Re: BGP, ebgp-multihop and multiple peers
daemon@ATHENA.MIT.EDU (Steve Bertrand)
Wed Aug 27 08:39:23 2008
Date: Wed, 27 Aug 2008 08:39:10 -0400
From: Steve Bertrand <steve@ibctech.ca>
To: Iljitsch van Beijnum <iljitsch@muada.com>
In-Reply-To: <A005F3D2-5641-4BE0-BAFD-212C3743D70D@muada.com>
Cc: NANOG list <nanog@merit.edu>
Errors-To: nanog-bounces@nanog.org
Iljitsch van Beijnum wrote:
> The advantage of a separate loopback address is that if you ever have
> any trouble, you can simply remove that address and the trouble is gone,
> too. This wouldn't work for the loopback address you also use for iBGP
> or a physical interface.
Ok. It probably would have made much more sense in my original post to
clarify that each eBGP multihop peer session is configured on separate
loopback interfaces, apart from the ones I use internally.
Generally, I leave lo0 as-is, lo1 for internal, then configure each eBGP
multihop peer on an incremental loopback basis thereafter.
So, in essence, I'll continue to use a loopback (separate from internal
functions) for ebgp-multihop peers, but instead of each session having
its own interface/IP, I'll share one for all of them.
Thanks everyone!
Steve
