IPv4 Anycast?
Nathan Ward
nanog at daork.net
Wed Apr 22 07:00:37 UTC 2009
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
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