[117425] in North American Network Operators' Group
Re: Multi-homed implementation and BGP convergence time
daemon@ATHENA.MIT.EDU (Kevin Loch)
Fri Sep 11 19:21:10 2009
Date: Fri, 11 Sep 2009 19:19:22 -0400
From: Kevin Loch <kloch@kl.net>
To: nanog@nanog.org
In-Reply-To: <4AAAD4EE.9030502@rollernet.us>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
Seth Mattinen wrote:
> Jay Hennigan wrote:
>> "Tier 1", "tier 2" etc. are terms used primarily by salespeople, and
>> don't have a lot to do with technical matters.
>>
>
> Sure it does. If you're multihoming it will increase your AS path length.
There is no general correlation between AS path length and whether
or not a network pays to exchange traffic.
There is a noticeable correlation between cost and local-preference,
as-path prepending, metric setting and other ways networks control
how they send you traffic. This is affected by peering selectivity
as well as transit prices.
- Kevin
