Suspecious anycast prefixes

David Miller dmiller at
Tue May 3 13:42:14 UTC 2011

On 5/3/2011 6:17 AM, Bill Woodcock wrote:
> Hash: SHA1
> On May 2, 2011, at 12:35 PM, Joe Abley wrote:
>> It's perhaps worth noting that there is work in the IETF to recommend that every prefix originated as part of an anycast cloud uses a unique origin AS (see<>). I'm not personally convinced of the arguments in the draft, but mentioning it in this thread seems reasonable.
> I'm also not convinced of the arguments in the draft, since it argues that it would be a best-practice for me to originate my address space from more than 8,000 different ASNs, when I currently do just fine advertising it from three.  I'd much rather there not exist a document that clueless people can point at and claim is a "best common practice" when it's neither best nor common.
>                                  -Bill


We are not convinced and are not planning on implementing this draft either.


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