[40919] in North American Network Operators' Group
Re: multi-homing fixes
daemon@ATHENA.MIT.EDU (Marshall Eubanks)
Sat Aug 25 17:26:43 2001
From: "Marshall Eubanks" <tme@21rst-century.com>
Reply-To: tme@21rst-century.com
To: Leo Bicknell <bicknell@ufp.org>, Randy Bush <randy@psg.com>,
Daniel Golding <dgolding@sockeye.com>,
Leo Bicknell <bicknell@ufp.org>, nanog@merit.edu
Date: Sat, 25 Aug 2001 17:30:44 -0400
Message-id: <3b881904.6072.0@idsonline.com>
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>
>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
