The Cidr Report

Mailman List Mirror (Read Only)
1

This report has been generated at Fri Nov 14 21:48:00 2003 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
        07-11-03 127597 90282
        08-11-03 127873 90220
        09-11-03 127555 90261
        10-11-03 127607 90361
        11-11-03 127817 90325
        12-11-03 127745 90342
        13-11-03 127842 90301
        14-11-03 127686 90402

AS Summary
         16121 Number of ASes in routing system
          6426 Number of ASes announcing only one prefix
          1410 Largest number of prefixes announced by an AS
                AS701 : ALTERNET-AS UUNET Technologies, Inc.
      73534720 Largest address span announced by an AS (/32s)
                AS568 : SUMNET-AS 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').

--- 14Nov03 ---
ASnum NetsNow NetsAggr NetGain % Gain Description

Table 127709 90347 37362 29.3% All ASes

AS4323 687 201 486 70.7% TW-COMM Time Warner
                                               Communications, Inc.
AS701 1410 979 431 30.6% ALTERNET-AS UUNET
                                               Technologies, Inc.
AS7018 1367 948 419 30.7% ATT-INTERNET4 AT&T WorldNet
                                               Services
AS7843 526 122 404 76.8% ADELPHIA-AS Adelphia Corp.
AS6197 641 261 380 59.3% BATI-ATL BellSouth Network
                                               Solutions, Inc
AS6198 611 253 358 58.6% BATI-MIA BellSouth Network
                                               Solutions, Inc
AS209 880 536 344 39.1% ASN-QWEST Qwest
AS22909 311 9 302 97.1% DNEO-OSP1 Comcast Cable
                                               Communications, Inc.
AS4355 386 101 285 73.8% ERMS-EARTHLNK EARTHLINK, INC
AS22773 305 25 280 91.8% CCINET-2 Cox Communications
                                               Inc. Atlanta
AS27364 338 72 266 78.7% ACS-INTERNET Armstrong Cable
                                               Services
AS6347 349 85 264 75.6% DIAMOND SAVVIS Communications
                                               Corporation
AS1221 955 693 262 27.4% ASN-TELSTRA Telstra Pty Ltd
AS1239 928 671 257 27.7% SPRINTLINK Sprint
AS17676 278 35 243 87.4% GIGAINFRA Softbank BB Corp.
AS4134 363 125 238 65.6% CHINANET-BACKBONE
                                               No.31,Jin-rong Street
AS25844 243 16 227 93.4% SKADDEN1 Skadden, Arps, Slate,
                                               Meagher & Flom LLP
AS9583 275 81 194 70.5% SATYAMNET-AS Satyam Infoway
                                               Ltd.,
AS11305 229 38 191 83.4% INTERLAND-NET1 Interland
                                               Incorporated
AS2386 397 214 183 46.1% INS-AS AT&T Data
                                               Communications Services
AS4519 193 12 181 93.8% MAAS Maas Communications
AS9498 210 32 178 84.8% BBIL-AP BHARTI BT INTERNET
                                               LTD.
AS6140 340 164 176 51.8% IMPSAT-USA ImpSat
AS6327 203 27 176 86.7% SHAW Shaw Communications Inc.
AS14654 175 2 173 98.9% WAYPORT Wayport
AS2048 252 86 166 65.9% LANET-1 State of Louisiana
AS7132 472 308 164 34.7% SBIS-AS SBC Internet Services
                                               - Southwest
AS20115 584 424 160 27.4% CHARTER-NET-HKY-NC Charter
                                               Communications
AS9929 192 36 156 81.2% CNCNET-CN China Netcom Corp.
AS15270 202 48 154 76.2% AS-PAETEC-NET PaeTec.net -a
                                               division of
                                               PaeTecCommunications, Inc.

Total 14302 6604 7698 53.8% Top 30 total

Possible Bogus Routes

        24.138.80.0/20 AS11260 ANDARA-HSI Andara High Speed Internet c/o Halifax Cable Ltd.
        61.12.32.0/24 AS7545 TPG-INTERNET-AP TPG Internet Pty Ltd
        61.12.34.0/24 AS7545 TPG-INTERNET-AP TPG Internet Pty Ltd
        64.30.64.0/19 AS14900 USLEC-CORP-1 USLEC Corp.
        66.41.192.0/18 AS13367 CCCH-AS3 Comcast Cable Communications Holdings, Inc
        69.8.128.0/17 AS7260 NORLIGHT Norlight Telecommunications
        132.0.0.0/10 AS568 SUMNET-AS DISO-UNRRA
        137.0.0.0/13 AS568 SUMNET-AS DISO-UNRRA
        138.136.0.0/13 AS568 SUMNET-AS DISO-UNRRA
        140.143.2.0/24 AS1221 ASN-TELSTRA Telstra Pty Ltd
        140.240.0.0/13 AS1 GNTY-1 Genuity
        158.0.0.0/13 AS568 SUMNET-AS DISO-UNRRA
        192.43.230.0/24 AS4738 SAARDNET-AS South Australian Academic Research and Development Network
        192.44.0.0/19 AS702 ALTERNET-AS UUNET Technologies, Inc.
        192.83.16.0/20 AS5515 SONERA-GLOBAL-IP Sonera Solution Autonomous System
        192.83.32.0/19 AS5515 SONERA-GLOBAL-IP Sonera Solution Autonomous System
        192.83.64.0/19 AS5515 SONERA-GLOBAL-IP Sonera Solution Autonomous System
        192.83.96.0/22 AS5515 SONERA-GLOBAL-IP Sonera Solution Autonomous System
        192.83.100.0/24 AS5515 SONERA-GLOBAL-IP Sonera Solution Autonomous System
        192.119.135.0/24 AS270 PSCNI-AS National Aeronautics and Space Administration
        192.124.252.0/22 AS680 AS680 DFN-IP service G-WiN
        192.135.50.0/24 AS7018 ATT-INTERNET4 AT&T WorldNet Services
        192.136.71.0/24 AS719 AS719 LANLINK autonomous system
        192.136.79.0/24 AS719 AS719 LANLINK autonomous system
        192.153.144.0/21 AS568 SUMNET-AS DISO-UNRRA
        192.172.0.0/19 AS568 SUMNET-AS DISO-UNRRA
        192.188.208.0/20 AS568 SUMNET-AS DISO-UNRRA
        192.243.32.0/23 AS2044 PALIN-AS Palin Aquisitions Inc.
        198.23.26.0/24 AS4390 BELLATLANTIC-COM Bell Atlantic, Inc.
        198.97.72.0/21 AS568 SUMNET-AS DISO-UNRRA
        198.97.80.0/20 AS568 SUMNET-AS DISO-UNRRA
        198.97.88.0/24 AS89 NUSC-CSTLNET-AS Naval Underwater Systems Center
        198.97.192.0/20 AS568 SUMNET-AS DISO-UNRRA
        198.97.240.0/20 AS568 SUMNET-AS DISO-UNRRA
        198.98.8.0/21 AS3701 NERONET Oregon Joint Graduate Schools of Engineering
        198.136.32.0/20 AS19329 MCNET Martin County Board of County Commissioners
        198.144.32.0/19 AS3998 CITY-NET CityNet, Inc.
        198.161.87.0/24 AS6539 GROUPTLCOM GT Group Telecom Services Corp.
        198.161.165.0/24 AS852 ASN852 Telus Advanced Communications
        198.163.155.0/24 AS684 MBNET-AS Manitoba Regional Network
        198.167.0.0/16 AS7456 INTERHOP Interhop Network SERVICES Inc.
        198.167.163.0/24 AS15290 ATTCA-15290 AT&T Canada Telecom Services Company
        198.168.0.0/16 AS701 ALTERNET-AS UUNET Technologies, Inc.
        198.169.0.0/16 AS803 SASKTEL SaskTel
        198.232.133.0/24 AS23075 SKOTOS-AS Skotos Tech, Inc
        199.10.0.0/16 AS568 SUMNET-AS DISO-UNRRA
        199.60.0.0/20 AS271 BCNET-AS University of British Columbia
        199.79.32.0/20 AS3701 NERONET Oregon Joint Graduate Schools of Engineering
        199.84.0.0/16 AS701 ALTERNET-AS UUNET Technologies, Inc.
        199.114.0.0/18 AS568 SUMNET-AS DISO-UNRRA
        199.114.0.0/21 AS568 SUMNET-AS DISO-UNRRA
        199.114.128.0/18 AS568 SUMNET-AS DISO-UNRRA
        199.114.130.0/24 AS721 DLA-ASNBLOCK-AS DoD Network Information Center
        199.114.132.0/24 AS721 DLA-ASNBLOCK-AS DoD Network Information Center
        199.114.136.0/24 AS1913 DLA4 Defense Logistics Agency
        199.114.140.0/24 AS3544 ITSDN-U7 DISA/UNRRA
        199.114.142.0/24 AS721 DLA-ASNBLOCK-AS DoD Network Information Center
        199.114.144.0/24 AS721 DLA-ASNBLOCK-AS DoD Network Information Center
        199.114.148.0/24 AS721 DLA-ASNBLOCK-AS DoD Network Information Center
        199.114.150.0/24 AS721 DLA-ASNBLOCK-AS DoD Network Information Center
        199.114.152.0/24 AS1913 DLA4 Defense Logistics Agency
        199.114.154.0/24 AS1733 CENTAF-SWA AF DDN PMO
        199.114.156.0/24 AS1913 DLA4 Defense Logistics Agency
        199.114.160.0/24 AS1733 CENTAF-SWA AF DDN PMO
        199.120.32.0/19 AS16582 NEXTLEVELINTERNET NEXTLEVEL INTERNET, INC.
        199.121.0.0/16 AS568 SUMNET-AS DISO-UNRRA
        199.123.0.0/18 AS568 SUMNET-AS DISO-UNRRA
        199.123.16.0/20 AS568 SUMNET-AS DISO-UNRRA
        199.123.80.0/21 AS568 SUMNET-AS DISO-UNRRA
        199.189.32.0/19 AS7332 IQUEST-AS IQuest Internet
        199.202.0.0/16 AS701 ALTERNET-AS UUNET Technologies, Inc.
        202.0.180.0/24 AS4058 LINKAGENET-AP CPCNet Hong Kong Ltd.
        202.3.158.0/24 AS17557 PKTELECOM-AS-AP Pakistan Telecom
        202.3.159.0/24 AS17557 PKTELECOM-AS-AP Pakistan Telecom
        202.4.252.0/22 AS4808 CHINA169-BJ CNCGROUP IP network��China169 Beijing Province Network
        202.4.255.0/24 AS4799 UNSPECIFIED Ji Tong Communications Co., Ltd.
        202.70.240.0/20 AS4058 LINKAGENET-AP CPCNet Hong Kong Ltd.
        202.74.32.0/19 AS9315 CWN-AS-AP Chomanan WorldNet Co., Ltd.
        202.93.0.0/20 AS4134 CHINANET-BACKBONE No.31,Jin-rong Street
        202.122.76.0/24 AS17553 TIMELESS-AP System Integration provider
        202.136.254.0/23 AS4808 CHINA169-BJ CNCGROUP IP network��China169 Beijing Province Network
        202.136.254.0/24 AS4808 CHINA169-BJ CNCGROUP IP network��China169 Beijing Province Network
        202.136.255.0/24 AS4808 CHINA169-BJ CNCGROUP IP network��China169 Beijing Province Network
        202.164.192.0/19 AS7599 IPXC-AS-AP IP Exchange
        202.165.0.0/19 AS9443 INTERNETPRIMUS-AS-AP Primus Telecommunications
        202.165.0.0/20 AS9443 INTERNETPRIMUS-AS-AP Primus Telecommunications
        202.165.16.0/20 AS9443 INTERNETPRIMUS-AS-AP Primus Telecommunications
        202.179.64.0/24 AS7633 SOFTNET-AS-AP Software Technology Parks of India
        202.179.65.0/24 AS7633 SOFTNET-AS-AP Software Technology Parks of India
        202.179.66.0/24 AS7633 SOFTNET-AS-AP Software Technology Parks of India
        202.179.67.0/24 AS7633 SOFTNET-AS-AP Software Technology Parks of India
        202.179.68.0/24 AS7633 SOFTNET-AS-AP Software Technology Parks of India
        202.189.234.0/23 AS9658 ETPI-IDS-AS-AP Eastern Telecoms Phils., Inc.
        203.10.17.0/24 AS9266 VIPER-AU-AP Vipernet
        203.10.18.0/24 AS9266 VIPER-AU-AP Vipernet
        203.10.19.0/24 AS9266 VIPER-AU-AP Vipernet
        203.10.21.0/24 AS9266 VIPER-AU-AP Vipernet
        203.10.22.0/24 AS9266 VIPER-AU-AP Vipernet
        203.10.23.0/24 AS9266 VIPER-AU-AP Vipernet
        203.32.4.0/23 AS7617 APNIC-AS-2-BLOCK Asia Pacific Network Information Centre
        203.62.0.0/17 AS7572 AARNET-ACT-RNO Australian Academic and Reasearch Network (AARNet)
        203.76.128.0/24 AS9729 IS-AP iAdvantage Limited
        203.76.224.0/24 AS9549 COMDEK-ISP-AS-AP Comdek ISP
        203.86.2.0/23 AS4058 LINKAGENET-AP CPCNet Hong Kong Ltd.
        203.129.126.0/24 AS7473 SINGTEL-AS-AP Singapore Telecom
        203.129.127.0/24 AS7473 SINGTEL-AS-AP Singapore Telecom
        203.132.95.0/24 AS9787 CONCEPT-AU-AP Concept Networks
        203.132.97.0/24 AS7652 VIANET-AS-AP Vianet Communications Pty Ltd
        203.132.99.0/24 AS7657 TIG-US-PAS-AP The Internet Group Limited
        203.132.102.0/24 AS9398 ARACHNET-AS-AP Arachnet
        203.132.103.0/24 AS9398 ARACHNET-AS-AP Arachnet
        203.132.104.0/24 AS9398 ARACHNET-AS-AP Arachnet
        203.132.105.0/24 AS9398 ARACHNET-AS-AP Arachnet
        203.132.106.0/24 AS9398 ARACHNET-AS-AP Arachnet
        203.132.107.0/24 AS10236 FOXGOLD-NET-AU-AP FOXGOLD COMMUNICATIONS
        203.132.108.0/24 AS10236 FOXGOLD-NET-AU-AP FOXGOLD COMMUNICATIONS
        203.132.109.0/24 AS10141 CALOUNDRA-AS-AP Caloundra.net
        203.132.110.0/24 AS7598 ALPHALINK-AS-AP Alphalink Pty Limited - Melbourne, Australia
        203.132.111.0/24 AS10236 FOXGOLD-NET-AU-AP FOXGOLD COMMUNICATIONS
        203.132.112.0/24 AS10236 FOXGOLD-NET-AU-AP FOXGOLD COMMUNICATIONS
        203.132.118.0/24 AS18065 CENTRALDATA-WA Central Data Pty Ltd.
        203.132.122.0/24 AS4802 WANTREE-AS-AP Wantree Development
        203.132.123.0/24 AS18065 CENTRALDATA-WA Central Data Pty Ltd.
        203.132.124.0/24 AS18065 CENTRALDATA-WA Central Data Pty Ltd.
        203.132.125.0/24 AS4817 TECHEX1-AS-AP Techex Primary Netblock
        203.135.99.0/24 AS2687 IBM-MMD-AS IBM
        203.135.224.0/19 AS4058 LINKAGENET-AP CPCNet Hong Kong Ltd.
        204.19.224.0/19 AS816 UUNET-AS4 UUNET Technologies, Inc.
        204.29.189.0/24 AS3956 TX-METRO Texas Metronet
        204.89.225.0/24 AS2495 KANREN Kansas Research and Education Network
        204.154.125.0/24 AS3952 TELLABS-ASN TELLABS Operations, Inc.
        204.154.126.0/24 AS3952 TELLABS-ASN TELLABS Operations, Inc.
        204.154.127.0/24 AS3952 TELLABS-ASN TELLABS Operations, Inc.
        204.194.110.0/23 AS10588 ICSNET Intelligent Computer Solutions, Inc
        205.150.0.0/15 AS701 ALTERNET-AS UUNET Technologies, Inc.
        206.41.32.0/19 AS14824 NEWSOUTH NewSouth Communications Corp.
        206.81.187.0/24 AS19194 JOVITA Sentris Network LLC
        206.82.64.0/18 AS7029 ALLTELNET Alltel Information Services, Inc.
        206.108.34.0/24 AS852 ASN852 Telus Advanced Communications
        206.108.35.0/24 AS852 ASN852 Telus Advanced Communications
        206.167.57.0/24 AS376 RISQ-AS Reseau Interordinateurs Scientique Quebecois (RISQ)
        206.191.64.0/18 AS15290 ATTCA-15290 AT&T Canada Telecom Services Company
        206.251.69.0/24 AS27429 TIL Telesat International Ltd.
        207.47.39.0/24 AS816 UUNET-AS4 UUNET Technologies, Inc.
        207.162.192.0/19 AS4589 EASYNET Easynet Group Plc
        207.231.96.0/19 AS11194 NUNETPA NuNet Inc
        208.81.187.0/24 AS19194 JOVITA Sentris Network LLC
        208.104.103.0/24 AS1239 SPRINTLINK Sprint
        209.151.128.0/19 AS816 UUNET-AS4 UUNET Technologies, Inc.
        209.169.219.0/24 AS189 GENUITY-AS189 Genuity
        209.169.223.0/24 AS189 GENUITY-AS189 Genuity
        209.172.0.0/18 AS7770 TRITON Triton Technologies, Inc.
        209.213.32.0/19 AS10629 INTERPAC Inter-Pacific Network Services
        209.213.50.0/24 AS10629 INTERPAC Inter-Pacific Network Services
        209.213.51.0/24 AS10629 INTERPAC Inter-Pacific Network Services
        209.213.55.0/24 AS10629 INTERPAC Inter-Pacific Network Services
        209.213.56.0/24 AS10629 INTERPAC Inter-Pacific Network Services
        209.222.137.0/24 AS27429 TIL Telesat International Ltd.
        209.240.96.0/19 AS10815 KCNET KCnet, Inc.
        209.251.0.0/19 AS11036 SISCOM SISCOM, Inc
        209.251.64.0/19 AS10266 NETWAY-AS MDC, Inc.
        210.213.0.0/19 AS6453 TELEGLOBE-AS Teleglobe Inc
        216.18.224.0/21 AS11458 IMBRIS IMBRIS, INC.
        216.18.224.0/22 AS11458 IMBRIS IMBRIS, INC.
        216.18.228.0/22 AS11458 IMBRIS IMBRIS, INC.
        216.47.32.0/19 AS11304 SPLUS Solutions Plus Inc.
        216.96.128.0/18 AS7018 ATT-INTERNET4 AT&T WorldNet Services
        218.211.0.0/16 AS4788 TMNET-AS-AP TMnet, Telekom Malaysia
        222.28.0.0/14 AS4538 ERX-CERNET-BKB China Education and Research Network Center

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

2

So anyway, was discussing the cidr report at the last nanog.. I was pointing out
that deaggregation is discouraged by the naming and shaming and then someone
else pointed out that this list has scarcely altered in months.

So, what can we do as the operator community if this report isnt having the
desired effect?

Steve

3

Stephen J. Wilcox writes on 11/14/2003 7:16 AM:

So anyway, was discussing the cidr report at the last nanog.. I was pointing out that deaggregation is discouraged by the naming and shaming and then someone else pointed out that this list has scarcely altered in months.

So, what can we do as the operator community if this report isnt having the desired effect?

Stop accepting /24 type routes?

4

Yeah maybe but what about where the RIRs have assigned independent /24 space..
or ISPs have subdelegated the IPs to a multihomed customer, was more thinking
about where a bunch of routes originating from a single ASN can be aggregated
rather than routing bloat in general. There are numerous such examples of people
with eg a /19 announcing 32x /24 etc

Steve

5

Stephen J. Wilcox writes on 11/14/2003 12:54 PM:

Yeah maybe but what about where the RIRs have assigned independent /24 space.. or ISPs have subdelegated the IPs to a multihomed customer, was more thinking
about where a bunch of routes originating from a single ASN can be aggregated rather than routing bloat in general. There are numerous such examples of people with eg a /19 announcing 32x /24 etc

So how do you deal with one but not with the other?

6

I think your confusing my point - they're different questions, legitimate
announcement of /24s by multihoming corporates is at least in principal okay.
But I do regulary see people announcing consecutive prefixes all originating in
the same AS and (from my view) having the same policy.

Ok look heres one example, looks like these guys have a /20:

Broad Band Networks / ESINET BBNESINET-48 (NET-12-5-48-0-1)
                                  12.5.48.0 - 12.5.55.255
Broad Band Networks / ESINET BROAD-BA16-56 (NET-12-5-56-0-1)
                                  12.5.56.0 - 12.5.59.255
BROAD BAND NETWORK SERVICES BROAD-BA927-60 (NET-12-5-60-0-1)
                                  12.5.60.0 - 12.5.63.255

So why do I see this lot from them? 11 routes where only one would suffice
(1100% more than needed for anyone mathematically challenged)..

* 12.5.48.0/24 6453 1239 5778 12163 i
* 12.5.48.0/21 6453 1239 5778 12163 i
* 12.5.49.0/24 6453 1239 5778 12163 i
* 12.5.50.0/23 6453 1239 5778 12163 i
* 12.5.52.0/24 6453 1239 5778 12163 i
* 12.5.54.0/23 6453 1239 5778 12163 i
* 12.5.56.0/23 6453 1239 5778 12163 i
* 12.5.56.0/22 6453 1239 5778 12163 i
* 12.5.58.0/24 6453 1239 5778 12163 i
* 12.5.59.0/24 6453 1239 5778 12163 i
* 12.5.60.0/22 6453 1239 5778 12163 i

I'm sure these arent the worst offenders but they were the first I came across
in my sh ip bgp ...

So who's job is it to clean this up - I dont think proxy aggregation is a good
idea as someone suggested, the only people in a position to fix this are the ISP
themselves, their upstreams and their peers.

Steve

7

Stephen J. Wilcox writes on 11/14/2003 6:55 PM:

So who's job is it to clean this up - I dont think proxy aggregation is a good idea as someone suggested, the only people in a position to fix this are the ISP themselves, their upstreams and their peers.

Thank you for making my point for me.

Nobody - other than the people actually announcing the routes (and their upstreams and peers) can resolve this problem.

So self discipline is the only solution - and that looks like it isn't going to happen anytime soon.

  srs

8

Stephen J. Wilcox writes on 11/14/2003 6:55 PM:

> So who's job is it to clean this up - I dont think proxy aggregation is a good
> idea as someone suggested, the only people in a position to fix this are the ISP
> themselves, their upstreams and their peers.

Thank you for making my point for me.

Huh? Your one liner didnt make a point.. ?

Nobody - other than the people actually announcing the routes (and their
upstreams and peers) can resolve this problem.

So self discipline is the only solution - and that looks like it isn't
going to happen anytime soon.

Erm right but see, thats the problem they're announcing lots of routes they dont
need to be and dont have self discipline, they need teaching and its not nobody,
other than themselves they have their peers and their upstreams, and their
upstreams in particular are going ot have the most control on dictating policy..

Steve