Re: IPv4 Anycast?

["Patrick W. Gilmore" <patrick () ianai net>]

On Apr 22, 2009, at 5:48 PM, Jack Bates wrote:
> Joe Provo wrote:
> > And the overall message is that only the (prefix holder|originating  
> > ASn[s]) can tell you if it is intended or not.  Sadly, this is not  
> > a useful metric for a third-party to use to determine prefix  
> > annoucnement legitimacy.  Perhaps an update to RPSL to allow for  
> > intentional multiple origins is overdue?
>
> Legitimacy no, but it does lead one to believe that most anycast  
> (given > 3 locations) is homogeneous. I would love multiple origin  
> support.

There are tons which have 2 origin ASes.  I realize that's not a lot  
of locations by today's anycast standards, but it is probably still  
common.

OTOH: "Serious" anycast obviously requires more than 2, so I grant  
your point.  The overwhelming majority of anycast is done from  
homogeneous origin AS.

Which means I was right. :)

--
TTFN,
patrick