North American Network Operators Group

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RE: multi-homing fixes

  • From: Daniel Golding
  • Date: Fri Aug 24 21:55:12 2001

There are excellent graphs on, now.
Of course, this only shows the North American part of the picture. The brief
summary is an extremely rapid growth in 1999 and 2000, with a much more
modest growth this year.

It would be an interesting "update" presentation at NANOG, if someone (maybe
from ARIN), were to do a combined graphs of all RIR AS number and IP Address
block growth, from ARIN, RIPE, and APNIC. This would also indicate the
timeframe needed for deployment of software to support 4 byte AS numbers.
FYI, recently issued AS numbers have been in the 22XXX area.

- Daniel Golding

-----Original Message-----
From: Leo Bicknell [mailto:[email protected]]
Sent: Friday, August 24, 2001 6:18 PM
To: Randy Bush
Cc: Daniel Golding; Leo Bicknell; [email protected]
Subject: Re: multi-homing fixes

On Fri, Aug 24, 2001 at 03:11:39PM -0700, Randy Bush wrote:
> please look at slides 11 and 15 of
>     <>
> 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

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.

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 - [email protected]
Systems Engineer - Internetworking Engineer - CCIE 3440
Read TMBG List - [email protected],