The Cidr Report

Geoff_Huston · June 4, 2004, 12:00pm

This report has been generated at Fri Jun 4 21:43:44 2004 AEST.
The report analyses the BGP Routing Table of an AS4637 (Reach) router
and generates a report on aggregation potential within the table.

Check http://www.cidr-report.org/as4637 for a current version of this report.

Recent Table History
        Date Prefixes CIDR Agg
        28-05-04 136044 96273
        29-05-04 137423 96268
        30-05-04 137948 96174
        31-05-04 137863 96101
        01-06-04 137984 96125
        02-06-04 137818 96104
        03-06-04 137774 96139
        04-06-04 137884 95196

AS Summary
         17255 Number of ASes in routing system
          6964 Number of ASes announcing only one prefix
          1420 Largest number of prefixes announced by an AS
                AS7018 : ATTW AT&T WorldNet Services
      73559296 Largest address span announced by an AS (/32s)
                AS568 : DISOUN DISO-UNRRA

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').

--- 04Jun04 ---
ASnum NetsNow NetsAggr NetGain % Gain Description

Table 136767 95172 41595 30.4% All ASes

AS6347 940 160 780 83.0% SAVV SAVVIS Communications
                                               Corporation
AS4134 738 158 580 78.6% CHINANET-BACKBONE
                                               No.31,Jin-rong Street
AS18566 708 169 539 76.1% CVAD Covad Communications
AS4323 731 204 527 72.1% TWTC Time Warner Telecom
AS7018 1420 985 435 30.6% ATTW AT&T WorldNet Services
AS6197 709 321 388 54.7% BNS-14 BellSouth Network
                                               Solutions, Inc
AS701 1297 932 365 28.1% UU UUNET Technologies, Inc.
AS9583 464 105 359 77.4% SATYAMNET-AS Satyam Infoway
                                               Ltd.,
AS7843 499 142 357 71.5% ADELPH-13 Adelphia Corp.
AS22909 390 33 357 91.5% CMCS Comcast Cable
                                               Communications, Inc.
AS6198 566 232 334 59.0% BNS-14 BellSouth Network
                                               Solutions, Inc
AS22773 378 58 320 84.7% CXAB Cox Communications Inc.
                                               Atlanta
AS27364 360 44 316 87.8% ARMC Armstrong Cable Services
AS1239 941 639 302 32.1% SPRN Sprint
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.
AS4355 381 99 282 74.0% ERSD EARTHLINK, INC
AS6140 390 129 261 66.9% IMPSA ImpSat
AS6478 305 48 257 84.3% ATTW AT&T WorldNet Services
AS1221 852 617 235 27.6% ASN-TELSTRA Telstra Pty Ltd
AS209 737 503 234 31.8% QWEST-4 Qwest
AS25844 243 16 227 93.4% SASMFL-2 Skadden, Arps, Slate,
                                               Meagher & Flom LLP
AS14654 230 5 225 97.8% WAYPOR-3 Wayport
AS3356 886 673 213 24.0% LEVEL3 Level 3 Communications
AS4766 476 264 212 44.5% KIX Korea Internet Exchange
                                               for "96 World Internet
                                               Exposition
AS9443 359 156 203 56.5% INTERNETPRIMUS-AS-AP Primus
                                               Telecommunications
AS2386 430 233 197 45.8% ADCS-1 AT&T Data
                                               Communications Services
AS5668 380 196 184 48.4% CIH-12 CenturyTel Internet
                                               Holdings, Inc.
AS6327 208 28 180 86.5% SHAWC-2 Shaw Communications
                                               Inc.

Total 17024 7288 9736 57.2% Top 30 total

Possible Bogus Routes

        24.138.80.0/20 AS11260 AHSICHCL Andara High Speed Internet c/o Halifax Cable Ltd.
        24.246.0.0/17 AS7018 ATTW AT&T WorldNet Services
        24.246.128.0/18 AS7018 ATTW AT&T WorldNet Services
        64.46.4.0/22 AS11711 TULARO TULAROSA COMMUNICATIONS
        64.46.12.0/24 AS7850 IHIGHW iHighway.net, Inc.
        64.46.27.0/24 AS8674 NETNOD-IX Netnod Internet Exchange Sverige AB
        64.46.34.0/24 AS3408
        64.46.63.0/24 AS7850 IHIGHW iHighway.net, Inc.
        66.114.0.0/19 AS16526 BIRCHT Birch Telecom, Inc.
        69.26.32.0/19 AS17307 VIRTEL-15 Virtela Communications
        132.0.0.0/10 AS568 DISOUN DISO-UNRRA
        137.0.0.0/13 AS568 DISOUN DISO-UNRRA
        138.136.0.0/13 AS568 DISOUN DISO-UNRRA
        158.0.0.0/13 AS568 DISOUN DISO-UNRRA
        192.30.93.0/24 AS17757 HPAUS-AP HP Australia
        192.30.94.0/24 AS17757 HPAUS-AP HP Australia
        192.30.127.0/24 AS719 LANLINK Elisa Oyj
        192.40.105.0/24 AS5515 SONERA-GLOBAL-IP Sonera Solution Autonomous System
        192.43.230.0/24 AS4738 SAARDNET-AS South Australian Academic Research and Development Network
        192.44.0.0/19 AS702 AS702 MCI EMEA
        192.81.182.0/24 AS719 LANLINK Elisa Oyj
        192.81.183.0/24 AS719 LANLINK Elisa Oyj
        192.81.184.0/24 AS719 LANLINK Elisa Oyj
        192.119.135.0/24 AS270 NASA National Aeronautics and Space Administration
        192.124.252.0/22 AS680 DFN-IP service G-WiN
        192.133.6.0/24 AS4004 GLOBALONE-EQUANT-UK Equant UK & Greece Autonomous System
        192.135.50.0/24 AS7018 ATTW AT&T WorldNet Services
        192.136.71.0/24 AS719 LANLINK Elisa Oyj
        192.136.79.0/24 AS719 LANLINK Elisa Oyj
        192.153.144.0/21 AS568 DISOUN DISO-UNRRA
        192.172.0.0/19 AS568 DISOUN DISO-UNRRA
        192.188.208.0/20 AS568 DISOUN DISO-UNRRA
        192.243.32.0/23 AS2044 PALINA Palin Aquisitions Inc.
        198.23.26.0/24 AS4390 BELLAT-7 Bell Atlantic, Inc.
        198.97.72.0/21 AS568 DISOUN DISO-UNRRA
        198.97.80.0/20 AS568 DISOUN DISO-UNRRA
        198.97.88.0/24 AS89 NUSC-1 Naval Underwater Systems Center
        198.97.192.0/20 AS568 DISOUN DISO-UNRRA
        198.97.240.0/20 AS568 DISOUN DISO-UNRRA
        198.97.247.0/24 AS3475 DEPART-52 Department of the Navy
        198.101.4.0/22 AS568 DISOUN DISO-UNRRA
        198.136.32.0/20 AS19329 MCBCC Martin County Board of County Commissioners
        198.144.32.0/19 AS3998 CITY CityNet, Inc.
        198.161.87.0/24 AS6539 GTGR GT Group Telecom Services Corp.
        198.161.165.0/24 AS852 AGTA Telus Advanced Communications
        198.163.155.0/24 AS684 MRN Manitoba Regional Network
        198.167.0.0/16 AS7456 INS-51 Interhop Network SERVICES Inc.
        198.167.163.0/24 AS15290 ACCA-2 Allstream Corp. Corporation Allstream
        198.168.0.0/16 AS701 UU UUNET Technologies, Inc.
        198.169.0.0/16 AS803 SASK SaskTel
        198.232.133.0/24 AS23075 SKOTOS Skotos Tech, Inc
        199.10.0.0/16 AS568 DISOUN DISO-UNRRA
        199.60.0.0/20 AS271 UBC-3 University of British Columbia
        199.84.0.0/16 AS701 UU UUNET Technologies, Inc.
        199.114.0.0/18 AS568 DISOUN DISO-UNRRA
        199.114.0.0/21 AS568 DISOUN DISO-UNRRA
        199.114.128.0/18 AS568 DISOUN DISO-UNRRA
        199.114.130.0/24 AS721 DNIC DoD Network Information Center
        199.114.132.0/24 AS721 DNIC DoD Network Information Center
        199.114.136.0/24 AS1913 DLA-8 Defense Logistics Agency
        199.114.138.0/24 AS721 DNIC DoD Network Information Center
        199.114.140.0/24 AS3544 DISAUN DISA/UNRRA
        199.114.142.0/24 AS721 DNIC DoD Network Information Center
        199.114.144.0/24 AS721 DNIC DoD Network Information Center
        199.114.148.0/24 AS721 DNIC DoD Network Information Center
        199.114.150.0/24 AS721 DNIC DoD Network Information Center
        199.114.152.0/24 AS1913 DLA-8 Defense Logistics Agency
        199.114.154.0/24 AS1733 ADP-41 AF DDN PMO
        199.114.156.0/24 AS1913 DLA-8 Defense Logistics Agency
        199.114.160.0/24 AS1733 ADP-41 AF DDN PMO
        199.120.32.0/19 AS16582 NXLI NEXTLEVEL INTERNET, INC.
        199.121.0.0/16 AS568 DISOUN DISO-UNRRA
        199.123.0.0/18 AS568 DISOUN DISO-UNRRA
        199.123.16.0/20 AS568 DISOUN DISO-UNRRA
        199.123.80.0/21 AS568 DISOUN DISO-UNRRA
        199.189.32.0/19 AS7332 IQUEST IQuest Internet
        199.197.8.0/22 AS21814 PARSON-18 Parsons Corp.
        199.202.0.0/16 AS701 UU UUNET Technologies, Inc.
        202.2.64.0/20 AS9729 IS-AP iAdvantage Limited
        202.47.1.0/24 AS7491 PI-PH-AS-AP PI-PHILIPINES
        202.70.0.0/20 AS4658 NETFRONT-AS NETFRONT I.T. LIMITED (HONG KONG)
        202.70.28.0/24 AS4515 ERX-STAR Star Internet Services Ltd.
        202.73.128.0/22 AS4058 LINKAGENET-AP CPCNet Hong Kong Ltd.
        202.86.142.0/24 AS30362 HAWAI-1 Hawaii-Pacific Teleport
        202.93.0.0/20 AS4134 CHINANET-BACKBONE No.31,Jin-rong Street
        202.123.96.0/20 AS9288 COMCEN-AS-AP Com-Cen Pty Ltd
        202.133.3.0/24 AS9335 CIP-JAPAN-AS-AP ATT IPlus
        202.141.160.0/24 AS9237 HUTCHCA-AS BTN Access Limited
        202.141.190.0/24 AS10026 ANC Asia Netcom Corporation
        202.141.191.0/24 AS4637 REACH Reach Network Border AS
        202.164.224.0/19 AS7599 IPXC-AS-AP IP Exchange
        203.32.4.0/23 AS7617
        203.62.0.0/17 AS7572 AARNET-ACT-RNO Australian Academic and Reasearch Network (AARNet)
        203.132.107.0/24 AS10236 FOXGOLD-NET-AU-AP FOXGOLD COMMUNICATIONS
        204.69.144.0/22 AS5668 CIH-12 CenturyTel Internet Holdings, Inc.
        204.154.125.0/24 AS3952 TELLAB-1 TELLABS Operations, Inc.
        204.154.126.0/24 AS3952 TELLAB-1 TELLABS Operations, Inc.
        204.154.127.0/24 AS3952 TELLAB-1 TELLABS Operations, Inc.
        204.194.110.0/23 AS30653 EXOBI Exobit Networks Inc.
        205.150.0.0/15 AS701 UU UUNET Technologies, Inc.
        205.159.72.0/24 AS1660 ANSCOM-5 ANS Communications
        206.41.32.0/19 AS14824 NCC-105 NewSouth Communications Corp.
        206.81.187.0/24 AS19194 SNL-8 Sentris Network LLC
        206.167.57.0/24 AS376 RISQR-3 Reseau Interordinateurs Scientique Quebecois (RISQ)
        206.191.64.0/18 AS15290 ACCA-2 Allstream Corp. Corporation Allstream
        206.251.69.0/24 AS27429 TIL-33 Telesat International Ltd.
        206.253.190.0/23 AS8123 POLYBA Polybase
        207.231.96.0/19 AS11194 NUNETI NuNet Inc
        208.81.187.0/24 AS19194 SNL-8 Sentris Network LLC
        209.169.219.0/24 AS189 GNTY Genuity
        209.169.223.0/24 AS189 GNTY Genuity
        209.172.0.0/18 AS7770 TRTI Triton Technologies, Inc.
        209.205.69.0/24 AS21578 Universidad autonoma de Bucaramanga
        209.205.70.0/24 AS21578 Universidad autonoma de Bucaramanga
        209.205.81.0/24 AS15066 SkyNet de Colombia S.A.
        209.205.82.0/24 AS15066 SkyNet de Colombia S.A.
        209.205.84.0/24 AS15066 SkyNet de Colombia S.A.
        209.213.32.0/19 AS10629 INS-52 Inter-Pacific Network Services
        209.213.50.0/24 AS10629 INS-52 Inter-Pacific Network Services
        209.213.51.0/24 AS10629 INS-52 Inter-Pacific Network Services
        209.213.55.0/24 AS10629 INS-52 Inter-Pacific Network Services
        209.213.56.0/24 AS10629 INS-52 Inter-Pacific Network Services
        209.222.137.0/24 AS27429 TIL-33 Telesat International Ltd.
        209.251.0.0/19 AS11036 SISCOM-1 SISCOM, Inc
        216.18.224.0/21 AS11458 IMBRIS-1 IMBRIS, INC.
        216.18.224.0/22 AS11458 IMBRIS-1 IMBRIS, INC.
        216.18.228.0/22 AS11458 IMBRIS-1 IMBRIS, INC.
        216.96.128.0/18 AS7018 ATTW AT&T WorldNet Services
        216.145.130.0/24 AS11937 TRXI TRX Inc.
        216.145.132.0/24 AS11937 TRXI TRX Inc.
        216.145.133.0/24 AS11937 TRXI TRX Inc.
        216.145.134.0/24 AS11937 TRXI TRX Inc.
        216.145.135.0/24 AS11937 TRXI TRX Inc.
        216.145.152.0/24 AS10758 INWAVE INWave Internet, Inc
        216.145.156.0/24 AS20304 JIS-32 JVLNET Internet Services
        216.145.158.0/24 AS20304 JIS-32 JVLNET Internet Services
        216.145.176.0/21 AS20304 JIS-32 JVLNET Internet Services
        216.145.177.0/24 AS20304 JIS-32 JVLNET Internet Services
        216.145.178.0/24 AS20304 JIS-32 JVLNET Internet Services
        216.145.184.0/21 AS10758 INWAVE INWave Internet, Inc
        216.145.200.0/21 AS20304 JIS-32 JVLNET Internet Services
        216.186.151.0/24 AS3356 LEVEL3 Level 3 Communications
        216.186.152.0/21 AS3356 LEVEL3 Level 3 Communications
        216.186.160.0/23 AS3356 LEVEL3 Level 3 Communications
        216.186.164.0/22 AS3356 LEVEL3 Level 3 Communications
        216.186.192.0/22 AS3356 LEVEL3 Level 3 Communications
        216.186.198.0/23 AS3356 LEVEL3 Level 3 Communications
        216.186.248.0/23 AS3356 LEVEL3 Level 3 Communications

Please see http://www.cidr-report.org for the full report

Paul_A_Vixie4 · June 4, 2004, 2:15pm

cidr-report@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!

Mark_Kasten · June 4, 2004, 2:37pm

yeah, we(being savvis) are aware. this will all disappear when AS6347 is integrated to AS3561. AS3561 is, for the most part clean, and it will stay that way. AS6347 will drop off the map in the coming months. have patience.

thx,
mark

Paul Vixie wrote: