Ah, that's very possible. So I suppose the 90 prefixes with 3 origin
ASes are due to the same reason..
Then there is basically no inter-As anycast besides the anycast prefix
for DNS root, since I only noticed like 8 prefixes that are announced by
more than 3 ASes..
----
--Zhenkai
Nathan Ward wrote:
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
