[124207] in North American Network Operators' Group

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Re: IPv4 ANYCAST setup

daemon@ATHENA.MIT.EDU (Joe Abley)
Fri Mar 26 13:15:55 2010

From: Joe Abley <jabley@hopcount.ca>
In-Reply-To: <4C12AD08-DCF9-40E9-ACCA-53A1142BF5AB@delong.com>
Date: Fri, 26 Mar 2010 10:15:11 -0700
To: Owen DeLong <owen@delong.com>
X-SA-Exim-Mail-From: jabley@hopcount.ca
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org


On 2010-03-26, at 10:04, Owen DeLong wrote:

> It doesn't require an unstable routing table.  There is a small set of
> locations that could hit routers with multipath that may "balance"
> the anycast packets down divergent paths.
>=20
> Essentially, these are the topological midpoints between any two
> (or more) anycast servers.

As with most things, there are risks and benefits to distributing =
services using anycast. There are also risks and benefits from not doing =
so.

Far too many words to bother people with here on this list, but the =
;login: article I include a link to earlier =
(<http://www.usenix.org/publications/login/2008-02/openpdfs/abley.pdf>) =
attempts to discuss ways in which people can decide whether anycast =
suits their own particular circumstances ("Horses for Courses").


Joe=


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