The Cidr Report

Fri Sep 27 12:00:01 UTC 2002

This report has been generated at Fri Sep 27 20:32:43 2002 AEST.
The report analyses the BGP Routing Table of the Route-Views router
and generates a report on aggregation potential within the table.

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

Recent Table History
        Date      Prefixes    CIDR Agg
        20-09-02    121329       87082
        21-09-02    121481       87337
        22-09-02    121438       87731
        23-09-02    121323       87980
        24-09-02    121407       88246
        25-09-02    121566       88349
        26-09-02    121459       87822
        27-09-02    122059       87558

Possible Bogus Routes

        7.1.1.0/30           AS12357 COMUNITEL Comunitel Global Autonomous System
        10.5.5.0/30          AS11537 ABILENE University Corporation for Advanced Internet Development
        10.11.11.0/30        AS11537 ABILENE University Corporation for Advanced Internet Development
        10.33.0.0/23         AS174   PSINET PSINet Inc.
        10.33.8.0/24         AS174   PSINET PSINet Inc.
        39.0.0.0/8           AS4554  EP0-BLK-ASNBLOCK-4 Exchange Point Blocks

AS Summary
         13979  Number of ASes in routing system
          5289  Number of ASes announcing only one prefix
          1816  Largest number of prefixes announced by an AS
                AS209  : ASN-QWEST Qwest
      73220608  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').

 --- 27Sep02 ---
ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

Table     121705    87359    34346    28.2%   All ASes

AS209       1816     1038      778    42.8%   ASN-QWEST Qwest
AS3908      1124      621      503    44.8%   SUPERNETASBLK SuperNet, Inc.
AS701       1786     1286      500    28.0%   ALTERNET-AS UUNET
                                               Technologies, Inc.
AS2548      1586     1123      463    29.2%   ICIX-MD-AS Business Internet,
                                               Inc.
AS7132       602      140      462    76.7%   SBIS-AS Southwestern Bell
                                               Internet Services
AS7018      1359      959      400    29.4%   ATT-INTERNET4 AT&T WorldNet
                                               Services
AS7843       711      341      370    52.0%   ADELPHIA-AS Adelphia Corp.
AS1221      1304      938      366    28.1%   ASN-TELSTRA Telstra Pty Ltd
AS4323       645      295      350    54.3%   TW-COMM Time Warner
                                               Communications, Inc.
AS852        756      458      298    39.4%   ASN852 Telus Advanced
                                               Communications
AS6197       382       97      285    74.6%   BATI-ATL BellSouth Network
                                               Solutions, Inc
AS7046       590      316      274    46.4%   UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS18566      272        4      268    98.5%   COVAD Covad Communications
AS174        593      330      263    44.4%   PSINET PSINet Inc.
AS4151       279       32      247    88.5%   USDA-1 USDA
AS4355       382      144      238    62.3%   ERMS-EARTHLNK EARTHLINK, INC
AS1          672      442      230    34.2%   GNTY-1 Genuity
AS6347       397      170      227    57.2%   DIAMOND SAVVIS Communications
                                               Corporation
AS4814       255       36      219    85.9%   CHINANET-BEIJING-AP China
                                               Telecom (Group)Beijing
                                               Telecom CompanyBeijing China
AS705        408      198      210    51.5%   ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS1580       210       11      199    94.8%   HQ, 5th Signal Command
AS22927      215       20      195    90.7%   AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS690        517      324      193    37.3%   NSFNET-T3-RT-AS Merit Network
                                               Inc.
AS1239      1110      930      180    16.2%   SprintLink Sprint
AS2386       421      243      178    42.3%   INS-AS AT&T Data
                                               Communications Services
AS3356       389      214      175    45.0%   LEVEL3 Level 3 Communications,
                                               LLC
AS6595       232       60      172    74.1%   DODDSEUR DoD Education
                                               Activity Network Assistance
                                               Center
AS1791       184       21      163    88.6%   SPRINTLINK3 Sprint Government
                                               Systems Division
AS4134       302      139      163    54.0%   ERX-CHINALINK Data
                                               Communications Bureau
AS6327       180       20      160    88.9%   SHAWFIBER Shaw Fiberlink
                                               Limited

Total      19679    10950     8729    44.4%   Top 30 total

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

------------------------------------
Copies of this report are mailed to:
  nanog at merit.edu
  eof-list at ripe.net
  apops at lists.apnic.net
  routing-wg at ripe.net
  afnog at afnog.org