Does anyone multihome anymore?
dhubbard at dino.hostasaurus.com
Wed Aug 22 14:31:23 UTC 2007
From: Mike Tancsa
> In my case, I have 6453 and 174 for transit. I want to get to 577
> which is directly connected to 6453 and 174. 577 has a higher local
> pref on paths via 174. Short of shutting my 174 session (or some
> deaggregation), I dont have a way to influence how 577 gets back to
> me. I can easily exit out 6453, but it does nothing for the return
> packets. I have enough capacity on 6453 to handle all my traffic,
> but its a Draconian step to take and some traffic via 174 is fine and
> would be worse if I fully shut the session. (ie. peers of 174
> 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.
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