Re: Anycast provider for SMTP?

[Jon Lewis <jlewis () lewis org>]

On Tue, 16 Jun 2015, Owen DeLong wrote:

> > On Jun 16, 2015, at 12:49 , Masataka Ohta <mohta () necom830 hpcl titech ac jp> wrote:
> >
> > William Herrin wrote:
> >
> > > If you read what Joe wrote, he doesn't currently have an AS number or
> > > employ BGP with his Internet providers. Extrapolate for his IPv4
> > > assignment situation and the /24 announcement barrier. In an
> > > IPv4-depleted world, he won't be doing anycast any time soon, even if
> > > it was a sound plan.
> >
> > Anyone having /24 can start hosting business with 255*N anycast servers.
> >
> >                                                         Masataka Ohta
>
>
> I donÿÿt think thatÿÿs quite trueÿÿ I think you will find that 254*N is 
> probably the best theoretical Max with just a /24 and that more likely, 
> youÿÿll need some hosts on that subnet that donÿÿt necessarily provide 
> anycast services bringing the practical limit somewhat lower. Of course, 
> if you have what you need to do 255, you can probably actually do 256.

Advertise the /24, internally route 256 /32s to the devices that service 
those IPs on one or more networks numbered out of other IP ranges.  The 
machines all need unique unicast IPs anyway.

----------------------------------------------------------------------
 Jon Lewis, MCP :)           |  I route
                             |  therefore you are
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