Re: IPv4 Anycast?

[Jeroen Massar <jeroen () unfix org>]

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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