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The Cidr Report



This report has been generated at Fri Nov 22 21:45:21 2002 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
        15-11-02    115525       83541
        16-11-02    115876       83482
        17-11-02    115903       83487
        18-11-02    115816       83543
        19-11-02    115965       83826
        20-11-02    115962       84457
        21-11-02    116704       84654
        22-11-02    116795       84742


AS Summary
         14074  Number of ASes in routing system
          5531  Number of ASes announcing only one prefix
          2106  Largest number of prefixes announced by an AS
                AS3908 : SUPERNETASBLK SuperNet, Inc.
      72949760  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').

 --- 22Nov02 ---
ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

Table     117134    84750    32384    27.6%   All ASes

AS3908      2106     1243      863    41.0%   SUPERNETASBLK SuperNet, Inc.
AS701       1715     1271      444    25.9%   ALTERNET-AS UUNET
                                               Technologies, Inc.
AS7843       665      297      368    55.3%   ADELPHIA-AS Adelphia Corp.
AS7018      1370     1006      364    26.6%   ATT-INTERNET4 AT&T WorldNet
                                               Services
AS18566      367        5      362    98.6%   COVAD Covad Communications
AS4323       524      184      340    64.9%   TW-COMM Time Warner
                                               Communications, Inc.
AS6197       457      122      335    73.3%   BATI-ATL BellSouth Network
                                               Solutions, Inc
AS1221      1183      858      325    27.5%   ASN-TELSTRA Telstra Pty Ltd
AS6347       360       80      280    77.8%   DIAMOND SAVVIS Communications
                                               Corporation
AS4355       403      136      267    66.3%   ERMS-EARTHLNK EARTHLINK, INC
AS7046       584      323      261    44.7%   UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS22927      275       20      255    92.7%   AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS209        589      338      251    42.6%   ASN-QWEST Qwest
AS1239       910      660      250    27.5%   SPRINTLINK Sprint
AS6198       415      167      248    59.8%   BATI-MIA BellSouth Network
                                               Solutions, Inc
AS705        436      203      233    53.4%   ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS4814       247       15      232    93.9%   CHINANET-BEIJING-AP China
                                               Telecom (Group)
AS4151       346      123      223    64.5%   USDA-1 USDA
AS1          657      441      216    32.9%   GNTY-1 Genuity
AS6140       267       66      201    75.3%   IMPSAT-USA ImpSat
AS852        666      467      199    29.9%   ASN852 Telus Advanced
                                               Communications
AS17676      229       30      199    86.9%   GIGAINFRA XTAGE CORPORATION
AS6595       247       56      191    77.3%   DODDSEUR DoD Education
                                               Activity Network Assistance
                                               Center
AS17557      307      122      185    60.3%   PKTELECOM-AS-AP Pakistan
                                               Telecom
AS4134       298      116      182    61.1%   ERX-CHINALINK Data
                                               Communications Bureau
AS690        507      331      176    34.7%   MERIT-AS-27 Merit Network Inc.
AS2048       264       88      176    66.7%   LANET-1 State of Louisiana
AS7132       223       67      156    70.0%   SBIS-AS Southwestern Bell
                                               Internet Services
AS2548       390      240      150    38.5%   ALGX-ATCW-AS Allegiance
                                               Telecom Companies Worldwide
AS6327       181       33      148    81.8%   SHAWFIBER Shaw Fiberlink
                                               Limited

Total      17188     9108     8080    47.0%   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

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