[113885] in North American Network Operators' Group
Re: IPv4 Anycast?
daemon@ATHENA.MIT.EDU (Patrick W. Gilmore)
Wed Apr 22 17:51:27 2009
From: "Patrick W. Gilmore" <patrick@ianai.net>
To: NANOG list <nanog@nanog.org>
In-Reply-To: <49EF9095.2060502@brightok.net>
Date: Wed, 22 Apr 2009 17:51:20 -0400
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Apr 22, 2009, at 5:48 PM, Jack Bates wrote:
> Joe Provo wrote:
>> And the overall message is that only the (prefix holder|originating
>> ASn[s]) can tell you if it is intended or not. Sadly, this is not
>> a useful metric for a third-party to use to determine prefix
>> annoucnement legitimacy. Perhaps an update to RPSL to allow for
>> intentional multiple origins is overdue?
>
> Legitimacy no, but it does lead one to believe that most anycast
> (given > 3 locations) is homogeneous. I would love multiple origin
> support.
There are tons which have 2 origin ASes. I realize that's not a lot
of locations by today's anycast standards, but it is probably still
common.
OTOH: "Serious" anycast obviously requires more than 2, so I grant
your point. The overwhelming majority of anycast is done from
homogeneous origin AS.
Which means I was right. :)
--
TTFN,
patrick
