yo, savvis, cox, comcast, and armstrong! (Re: The Cidr Report)
Paul Vixie
vixie at vix.com
Fri Jun 4 14:15:49 UTC 2004
cidr-report at potaroo.net writes:
> This report has been generated at Fri Jun 4 21:43:44 2004 AEST.
> ...
> Recent Table History
> Date Prefixes CIDR Agg
> ...
> 03-06-04 137774 96139
> 04-06-04 137884 95196
ok, so in one day we saw the addition of 110 prefixes, but they were aligned
such that the size of a properly cidr-aggregated table dropped by 943. this
is quite a trick. what does it all mean?
> ...
> Aggregation Summary
> The algorithm used in this report proposes aggregation only
> when there is a precise match using the AS path, so as
> to preserve traffic transit policies. Aggregation is also
> proposed across non-advertised address space ('holes').
and who's doing it?
> ASnum NetsNow NetsAggr NetGain % Gain Description
>
> Table 136767 95172 41595 30.4% All ASes
>
> AS6347 940 160 780 83.0% SAVV SAVVIS Communications
> Corporation
yo, savvis! you're putting 940 routes into the global routing table, and
when somebody did "sort -u" on the as-paths, they found that with no change
to your transit policies, you could be sending just 160 instead. "help?"
> AS22909 390 33 357 91.5% CMCS Comcast Cable
> Communications, Inc.
yo, comcast!
> AS22773 378 58 320 84.7% CXAB Cox Communications Inc.
> Atlanta
> AS27364 360 44 316 87.8% ARMC Armstrong Cable Services
yo, cox and armstrong!
> AS11172 351 56 295 84.0% Servicios Alestra S.A de C.V
> AS17676 339 50 289 85.3% JPNIC-JP-ASN-BLOCK Japan
> Network Information Center
> AS9929 316 33 283 89.6% CNCNET-CN China Netcom Corp.
> AS6478 305 48 257 84.3% ATTW AT&T WorldNet Services
> AS25844 243 16 227 93.4% SASMFL-2 Skadden, Arps, Slate,
> Meagher & Flom LLP
> AS14654 230 5 225 97.8% WAYPOR-3 Wayport
> AS6327 208 28 180 86.5% SHAWC-2 Shaw Communications
> Inc.
yo! yo! yo! (i've only listed those who could reduce their impact on the
global routing table by 80% or more... as you all saw, the list *was* longer.)
there are any number of unemployed bgp experts haunting this mailing list
looking for post-dotbomb work. many of them would accept work as short term
consultants to help you folks get down under the 80% level. just ask!
--
Paul Vixie
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