The Cidr Report

Sat Sep 28 22:17:33 UTC 2002

This report has been generated at Sun Sep 29 06:32:47 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
        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       87644
        28-09-02    123673       89338
        29-09-02    123685       89454

Possible Bogus Routes

        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
         13991  Number of ASes in routing system
          5313  Number of ASes announcing only one prefix
          1940  Largest number of prefixes announced by an AS
                AS174  : PSINET PSINet Inc.
      73212416  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').

 --- 29Sep02 ---
ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

Table     123655    89454    34201    27.7%   All ASes

AS209       1818     1042      776    42.7%   ASN-QWEST Qwest
AS3908      1124      622      502    44.7%   SUPERNETASBLK SuperNet, Inc.
AS701       1786     1286      500    28.0%   ALTERNET-AS UUNET
                                               Technologies, Inc.
AS2548      1582     1119      463    29.3%   ICIX-MD-AS Business Internet,
                                               Inc.
AS7132       603      140      463    76.8%   SBIS-AS Southwestern Bell
                                               Internet Services
AS174       1940     1520      420    21.6%   PSINET PSINet Inc.
AS7018      1360      959      401    29.5%   ATT-INTERNET4 AT&T WorldNet
                                               Services
AS1221      1306      940      366    28.0%   ASN-TELSTRA Telstra Pty Ltd
AS4323       647      305      342    52.9%   TW-COMM Time Warner
                                               Communications, Inc.
AS7843       712      410      302    42.4%   ADELPHIA-AS Adelphia Corp.
AS852        758      458      300    39.6%   ASN852 Telus Advanced
                                               Communications
AS6197       383       97      286    74.7%   BATI-ATL BellSouth Network
                                               Solutions, Inc
AS7046       585      312      273    46.7%   UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS18566      273        4      269    98.5%   COVAD Covad Communications
AS4151       279       32      247    88.5%   USDA-1 USDA
AS4355       383      145      238    62.1%   ERMS-EARTHLNK EARTHLINK, INC
AS1          669      447      222    33.2%   GNTY-1 Genuity
AS6347       393      173      220    56.0%   DIAMOND SAVVIS Communications
                                               Corporation
AS4814       255       37      218    85.5%   CHINANET-BEIJING-AP China
                                               Telecom (Group)Beijing
                                               Telecom CompanyBeijing China
AS705        409      199      210    51.3%   ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS1239       849      652      197    23.2%   SprintLink Sprint
AS22927      215       20      195    90.7%   AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS690        518      325      193    37.3%   NSFNET-T3-RT-AS Merit Network
                                               Inc.
AS6595       250       68      182    72.8%   DODDSEUR DoD Education
                                               Activity Network Assistance
                                               Center
AS4134       302      122      180    59.6%   ERX-CHINALINK Data
                                               Communications Bureau
AS2386       421      243      178    42.3%   INS-AS AT&T Data
                                               Communications Services
AS3356       389      212      177    45.5%   LEVEL3 Level 3 Communications,
                                               LLC
AS1791       184       21      163    88.6%   SPRINTLINK3 Sprint Government
                                               Systems Division
AS6327       180       20      160    88.9%   SHAWFIBER Shaw Fiberlink
                                               Limited
AS376        337      184      153    45.4%   RISQ-AS Reseau
                                               Interordinateurs Scientique
                                               Quebecois (RISQ)

Total      20910    12114     8796    42.1%   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