Re: well-known Anycast prefixes

[Siyuan Miao <aveline () misaka io>]

A Well-known BGP community will be better.

You'll need to rewrite next hop or do something similar if AnyCast prefixes
are learnt from a multi hop BGP feed, and it made the configuration more
complicated and difficult to debug.

On Wed, Mar 20, 2019, 01:48 Fredy Kuenzler <kuenzler () init7 net> wrote:

> Am 19.03.19 um 18:39 schrieb Bill Woodcock:
> > > On Mar 19, 2019, at 10:12 AM, Fredy Kuenzler <kuenzler () init7 net>
> > > wrote: I wonder whether anyone has ever compiled a list of
> > > well-known Anycast prefixes.
> >
> > I don’t know of one.
> >
> > It seems like a good idea.
> >
> > BGP-multi-hop might be a reasonable way to collect them.
> >
> > If others agree that it’s a good idea, and it’s not stepping on
> > anyone’s toes, PCH would be happy to host/coordinate.
>
> Thanks for the effort, much appreciated.
>
> Am 19.03.19 um 18:40 schrieb Joe Provo:
> > I think one would want that internal and no rely upon someone else
> > maintaining it.  You might check if Oracle followed up on the
> > Renesys/Dyn work documented:
> > https://dyn.com/wp-content/uploads/2014/07/NANOG59_Anycast.pdf
> >
> > ...where there were ~600 anycast v4 prefixes at the time.
>
> That's a lot %-]
>
> Maybe a well-known community (similar to RFC7999) could be defined and
> every Anycast operator could tag his prefixes? That's likely a better
> idea than manually maintain some list somewhere.
>
> --
> Fredy Kuenzler
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