[38619] in North American Network Operators' Group
RE: /24s run amuck again
daemon@ATHENA.MIT.EDU (Karyn Ulriksen)
Fri Jun 8 12:32:49 2001
Message-ID: <0127E258EE29D3118A0F00609765B4487C96F3@NET-GW-0014549.ix.sitestream.net>
From: Karyn Ulriksen <kulriksen@publichost.com>
To: "'Richard A. Steenbergen'" <ras@e-gerbil.net>
Cc: "'nanog@merit.edu'" <nanog@merit.edu>
Date: Fri, 8 Jun 2001 09:31:03 -0700
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I had a full /19 sliced and diced up into /24 until yesterday when I
officially completed my data center migration. None appear in the list
below. How recent is this information?
Karyn
:: -----Original Message-----
:: From: Richard A. Steenbergen [mailto:ras@e-gerbil.net]
:: Sent: Friday, June 08, 2001 12:51 AM
:: To: nanog@merit.edu
:: Subject: /24s run amuck again
::
::
::
:: We all know that /24s have run amuck. According to the APNIC bgp
:: statistics (http://www.apnic.net/stats/bgp) view of the internet, the
:: current prefix distribution looks:
::
:: Routing Table Report June 08, 2001
:: BGP routing table entries examined: 106727
::
:: Number of prefixes announced per prefix length (Global)
:: -------------------------------------------------------
::
:: /1:0 /2:0 /3:0 /4:0 /5:0
:: /6:0
:: /7:0 /8:20 /9:5 /10:6 /11:9
:: /12:32
:: /13:77 /14:207 /15:346 /16:6905 /17:1175
:: /18:2174
:: /19:6720 /20:5247 /21:4509 /22:6779 /23:8684
:: /24:61402
:: /25:278 /26:450 /27:463 /28:489 /29:374
:: /30:317
:: /31:1 /32:58
::
:: This mean over 57% of the routing table consists of /24s. So
:: in order to
:: facilitate getting this fixed, I have prepared a list of the worst
:: offenders and their specific blocks which (most likely) have
:: no reason for
:: not being aggregated. If all of these entries could be
:: aggregated (and I'm
:: certain this simple script missed some), it would reduce the
:: routing table
:: by over 29,000 entries, to less the 78k. I think it's pretty
:: obvious that
:: a lot of these simply have no excuse.
::
::
:: http://www.e-gerbil.net/ras/projects/ipaddr/24amuck.txt
::
::
:: A list of ASNs with the largest sized offending blocks (not
:: overall count,
:: #1 is UU #2 is BBN #3 is Telstra nothing unexpected there) is:
::
:: 2711 - Rock Hill Telephone Company
:: 8112 - Bell Atlantic Internet Solutions
:: 701 - UUNet Technologies, Inc.
:: 11371 - Rhythms NetConnections
:: 226 - Los Nettos
:: 7029 - Alltel Information Services, Inc.
:: 18687 - MGC Communications, Inc.
:: 6595 - DoD Education Activity Network Assistance Center
:: 1677 - ANS Communications
:: 1785 - AppliedTheory Corporation
:: 1326 - Advanced Networks & Services Inc.
:: 6499 - Brooks Fiber Properties, Inc.
::
:: I highly encourage anyone interested to yell at these people.
::
:: --
:: Richard A Steenbergen <ras@e-gerbil.net>
:: http://www.e-gerbil.net/ras
:: PGP Key ID: 0x138EA177 (67 29 D7 BC E8 18 3E DA B2 46 B3
:: D8 14 36 FE B6)
::
::
::
::
