[113843] in North American Network Operators' Group
Re: IPv4 Anycast?
daemon@ATHENA.MIT.EDU (Nathan Ward)
Wed Apr 22 03:00:53 2009
From: Nathan Ward <nanog@daork.net>
To: nanog list <nanog@nanog.org>
In-Reply-To: <49EEBECE.50005@ucla.edu>
Date: Wed, 22 Apr 2009 19:00:37 +1200
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 22/04/2009, at 6:53 PM, Zhenkai Zhu wrote:
> Hello NANOG,
>
> I noticed that more than 3K prefixes are with 2 Origin ASes.
> Are they the simplest cases of anycast? Or they are mainly due to
> misconfiguration?
The third (and probably more likely) option is that the prefixes are
advertised by two providers as the customer wants redundancy with
their own IP space, but does not have a public ASN. Ie. the customer
has a circuit and possibly a BGP feed to two different providers.
--
Nathan Ward
