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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical 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 >> >> <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 - [email protected] >Systems Engineer - Internetworking Engineer - CCIE 3440 >Read TMBG List - [email protected], www.tmbg.org > > Marshall Eubanks [email protected]
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