[98878] in North American Network Operators' Group
RE: Does anyone multihome anymore?
daemon@ATHENA.MIT.EDU (David Hubbard)
Wed Aug 22 10:40:21 2007
Date: Wed, 22 Aug 2007 10:31:23 -0400
From: "David Hubbard" <dhubbard@dino.hostasaurus.com>
To: <nanog@merit.edu>
Errors-To: owner-nanog@merit.edu
From: Mike Tancsa
>=20
> Hi,
> In my case, I have 6453 and 174 for transit. I want to get to 577=20
> which is directly connected to 6453 and 174. 577 has a higher local=20
> pref on paths via 174. Short of shutting my 174 session (or some=20
> deaggregation), I dont have a way to influence how 577 gets back to=20
> me. I can easily exit out 6453, but it does nothing for the return=20
> packets. I have enough capacity on 6453 to handle all my traffic,=20
> but its a Draconian step to take and some traffic via 174 is fine and=20
> would be worse if I fully shut the session. (ie. peers of 174=20
> in Toronto)
That's because Cogent has chosen to not give us the BGP communities
needed to influence traffic destined to you from their other peers.
They're one of the providers I use and I just turn them off when they
are having issues. With Level 3, for example, I can path prepend to
just certain remote AS's, etc., it's nice to have that control.
Dave
