[44074] in North American Network Operators' Group
Re: redistribution
daemon@ATHENA.MIT.EDU (Chrisy Luke)
Sat Nov 3 14:11:10 2001
Date: Sat, 3 Nov 2001 19:10:22 +0000
From: Chrisy Luke <chrisy@flix.net>
To: Randy Bush <randy@psg.com>
Cc: Alex Bligh <alex@alex.org.uk>, nanog@nanog.org
Message-ID: <20011103191022.A69721@flix.net>
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In-Reply-To: <E1605mQ-000NZ1-00@rip.psg.com>; from randy@psg.com on Sat, Nov 03, 2001 at 10:44:30AM -0800
Errors-To: owner-nanog-outgoing@merit.edu
Randy Bush wrote (on Nov 03):
> > if you don't, then traffic from cust2 to customers of exchange peers will
> > trombone across the expensive link.
>
> and back again, and back again, and ...
Only if you're mad enough to try to run BGP across a network with
forwarding devices in the middle that don't.
Even a monetary argument for this weak. Routing decisions in a routing
domain need to be deterministic otherwise you risk the loops you mention.
In a small network you may be able to get away with it. I personally have
better things to worry about and I am sure most people do too.
IGP's rarely make the same decisions as EGP's. They don't have the same
data to base their decisions on.
Chris.
--
== chris@easynet.net T: +44 845 333 0122
== Global IP Network Engineering, Easynet Group PLC F: +44 845 333 0122
