[153276] in North American Network Operators' Group
Re: Questions about anycasting setup
daemon@ATHENA.MIT.EDU (Mehmet Akcin)
Mon Jun 4 13:38:27 2012
From: Mehmet Akcin <mehmet@akcin.net>
In-Reply-To: <3C5E8697-8AFD-4A4B-9A4F-4AD48BE71F52@pch.net>
Date: Mon, 4 Jun 2012 10:37:10 -0700
To: Bill Woodcock <woody@pch.net>
Cc: NANOG Mailing List <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Jun 3, 2012, at 2:11 PM, Bill Woodcock wrote:
> On Jun 3, 2012, at 12:35 PM, Anurag Bhatia wrote:
>> I tried doing anycasting with 3 nodes, and seems like it didn't =
worked well
>> at all. It seems like ISPs prefer their own or their customer route =
(which
>> is our transit provider) and there is almost no "short/local route" =
effect.
>=20
> Correct. That's why you need to use the same transit providers at =
each location.
It could be a nightmare to try to balance the traffic when you are using =
different providers.=20
You can go ahead and try using path prepending but you will always find =
some strangeness going on regardless.
As Bill mentioned using the same transit will help, especially if you =
use a transit provider that has some communities pre-defined which will =
allow you to automatically advertise or not (even geographically) , and =
path prepend by simply sending communities out , you will save lots of =
time.
Mehmet
