[apops] The Cidr Report

  • To: cidr-report at potaroo dot net
  • Subject: [apops] The Cidr Report
  • From: cidr-report at potaroo dot net
  • Date: Fri, 21 Mar 2003 22:00:01 +1100 (EST)
  • Cc: nanog at merit dot edu, eof-list at ripe dot net, apops at apops dot net, routing-wg at ripe dot net, afnog at afnog dot org
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    • 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
              14-03-03    120659       86373
              15-03-03    120724       85975
              16-03-03    120525       85886
              17-03-03    120567       85987
              18-03-03    120637       86171
              19-03-03    120704       86222
              20-03-03    120817       86331
              21-03-03    120815       86377
      
      
      AS Summary
               14780  Number of ASes in routing system
                5842  Number of ASes announcing only one prefix
                1555  Largest number of prefixes announced by an AS
                      AS701  : ALTERNET-AS UUNET Technologies, Inc.
            73048064  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').
      
       --- 21Mar03 ---
      ASnum    NetsNow NetsAggr  NetGain   % Gain   Description
      
      Table     120844    86356    34488    28.5%   All ASes
      
      AS3908      1097      536      561    51.1%   SUPERNETASBLK SuperNet, Inc.
      AS18566      505       13      492    97.4%   COVAD Covad Communications
      AS4151       545      108      437    80.2%   USDA-1 USDA
      AS701       1555     1126      429    27.6%   ALTERNET-AS UUNET
                                                     Technologies, Inc.
      AS7843       614      214      400    65.1%   ADELPHIA-AS Adelphia Corp.
      AS4323       555      173      382    68.8%   TW-COMM Time Warner
                                                     Communications, Inc.
      AS7018      1353      982      371    27.4%   ATT-INTERNET4 AT&T WorldNet
                                                     Services
      AS1221      1104      808      296    26.8%   ASN-TELSTRA Telstra Pty Ltd
      AS22927      295       14      281    95.3%   AR-TEAR2-LACNIC TELEFONICA DE
                                                     ARGENTINA
      AS1239       972      692      280    28.8%   SPRINTLINK Sprint
      AS1          705      430      275    39.0%   GNTY-1 Genuity
      AS6197       475      202      273    57.5%   BATI-ATL BellSouth Network
                                                     Solutions, Inc
      AS4355       385      119      266    69.1%   ERMS-EARTHLNK EARTHLINK, INC
      AS6198       448      183      265    59.2%   BATI-MIA BellSouth Network
                                                     Solutions, Inc
      AS705        457      203      254    55.6%   ASN-ALTERNET UUNET
                                                     Technologies, Inc.
      AS4814       264       15      249    94.3%   CHINANET-BEIJING-AP China
                                                     Telecom (Group)
      AS2386       496      275      221    44.6%   INS-AS AT&T Data
                                                     Communications Services
      AS27364      278       69      209    75.2%   ACS-INTERNET Armstrong Cable
                                                     Services
      AS17676      233       29      204    87.6%   GIGAINFRA XTAGE CORPORATION
      AS22291      243       48      195    80.2%   CHARTER-LA Charter
                                                     Communications
      AS4134       310      119      191    61.6%   CHINANET-BACKBONE
                                                     No.31,Jin-rong Street
      AS209        531      341      190    35.8%   ASN-QWEST Qwest
      AS690        504      314      190    37.7%   MERIT-AS-27 Merit Network Inc.
      AS6347       370      194      176    47.6%   DIAMOND SAVVIS Communications
                                                     Corporation
      AS3561       517      342      175    33.8%   CWUSA Cable & Wireless USA
      AS2048       259       87      172    66.4%   LANET-1 State of Louisiana
      AS17557      374      211      163    43.6%   PKTELECOM-AS-AP Pakistan
                                                     Telecom
      AS22773      191       32      159    83.2%   CCINET-2 Cox Communications
                                                     Inc. Atlanta
      AS7303       242       89      153    63.2%   AR-TAST-LACNIC Telecom
                                                     Argentina Stet-France Telecom
                                                     S.A.
      AS8372       182       30      152    83.5%   COLT-UK-AS  COLT Internet UK
                                                     Access Network.
      
      Total      16059     7998     8061    50.2%   Top 30 total
      
      
      
      Please see http://www.cidr-report.org for the full report
      
      ------------------------------------
      Copies of this report are mailed to:
        nanog at merit dot edu
        eof-list at ripe dot net
        apops at apops dot net
        routing-wg at ripe dot net
        afnog at afnog dot org