Re: multi-homing fixes

["Marshall Eubanks" <tme () 21rst-century com>]

> On Fri, Aug 24, 2001 at 03:11:39PM -0700, Randy Bush wrote:
> > please look at slides 11 and 15 of
> >
> >     <http://psg.com/~randy/010809.ptomaine.pdf>
> >
> > the /24s of small multihomers is half the routing table (see geoff's data)

> > and is growing radially (if you are silly enough not to filter that stuff).

> Does anyone have a graph of the number of allocated AS numbers? I
> ask because in a perfect world each AS would originate 1 prefix
> only, as they got enough address space in their first alloaction
> to service them forever.  In that case growth of the AS table would
> be the growth of the routing table.

There are a number of such plots - we have one at
http://www.multicasttech.com/status/asn.plot.gif - 
see http://www.multicasttech.com/status/ for explanation -
and there are ones at Telstra -see
http://www.telstra.net/gih/papers/ipj/4-1-bgp.pdf and
http://www.telstra.net/ops/bgp/pc3/bgp-as-count.html

By all indications, the growth in both active AS and BGP
prefixes has slowed since the market collapse.

There are currently ~ 11,000 active AS and ~ 104,000 prefixes, so
each ASN has on average about 9 and 1/2 prefix blocks.

Regards
Marshall Eubanks

> The real world would never work like that of course, but it is an
> absolute lower bound on the table size, I think.  I do believe we
> can get much closer to this world with address space sizes like
> those available in IPv6, however it's not clear to me that people
> are really trying to think that way.
>
> -- 
> Leo Bicknell - bicknell () ufp org
> Systems Engineer - Internetworking Engineer - CCIE 3440
> Read TMBG List - tmbg-list-request () tmbg org, www.tmbg.org

Marshall Eubanks

tme () 21rst-century com