IPv4 Anycast?

Wed Apr 22 21:27:03 UTC 2009

Kevin Loch wrote:
> Patrick W. Gilmore wrote:
>> On Apr 22, 2009, at 4:35 PM, Jack Bates wrote:
>>> Zhenkai Zhu wrote:
>>>> I just want to make sure if I understand correctly. You mean that
>>>> the anycasted address space can be announced in different places yet
>>>> with the same origin AS?
>>>
>>> Yes, and it is commonly done.
>>
>> I was under the impression anycast services with homogeneous origin AS
>> was far more common than the heterogeneous.  Almost all the instances
>> I know of use homogeneous origin AS.
>>
>> I'd be interested in statistics either way.
> 
> 192.88.99.0/24, 2002::/16, and 2001::/32 are some
> notable examples of heterogeneous origin AS.

And those prefixes (6to4 & Teredo) all come with annoying problems as
one never knows which relay is really being used and it is hard to debug
how the packets really flow.

Greets,
 Jeroen

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