The Cidr Report

cidr-report at potaroo.net cidr-report at potaroo.net
Fri Oct 11 12:00:01 UTC 2002


This report has been generated at Fri Oct 11 21:45:36 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
        04-10-02    114025       82170
        05-10-02    114135       82280
        06-10-02    114325       82318
        07-10-02    114398       82256
        08-10-02    114434       82620
        09-10-02    114687       82510
        10-10-02    114415       82589
        11-10-02    114611       82621

Possible Bogus Routes

        192.0.0.0/24         AS3215  AS3215 France Telecom Transpac


AS Summary
         13857  Number of ASes in routing system
          5394  Number of ASes announcing only one prefix
          1762  Largest number of prefixes announced by an AS
                AS701  : ALTERNET-AS UUNET Technologies, Inc.
      73081088  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').

 --- 11Oct02 ---
ASnum    NetsNow NetsAggr  NetGain   % Gain   Description

Table     114736    82545    32191    28.1%   All ASes

AS4637       703      119      584    83.1%   REACH Reach Network Border AS
AS7132       594       71      523    88.0%   SBIS-AS Southwestern Bell
                                               Internet Services
AS3908      1036      533      503    48.6%   SUPERNETASBLK SuperNet, Inc.
AS701       1762     1277      485    27.5%   ALTERNET-AS UUNET
                                               Technologies, Inc.
AS7843       721      327      394    54.6%   ADELPHIA-AS Adelphia Corp.
AS7018      1349      992      357    26.5%   ATT-INTERNET4 AT&T WorldNet
                                               Services
AS4323       519      182      337    64.9%   TW-COMM Time Warner
                                               Communications, Inc.
AS1221      1206      886      320    26.5%   ASN-TELSTRA Telstra Pty Ltd
AS18566      298        4      294    98.7%   COVAD Covad Communications
AS852        736      457      279    37.9%   ASN852 Telus Advanced
                                               Communications
AS6347       342       77      265    77.5%   DIAMOND SAVVIS Communications
                                               Corporation
AS4151       292       37      255    87.3%   USDA-1 USDA
AS6197       392      140      252    64.3%   BATI-ATL BellSouth Network
                                               Solutions, Inc
AS4355       370      126      244    65.9%   ERMS-EARTHLNK EARTHLINK, INC
AS7046       574      337      237    41.3%   UUNET-CUSTOMER UUNET
                                               Technologies, Inc.
AS209        573      337      236    41.2%   ASN-QWEST Qwest
AS1239       874      655      219    25.1%   SprintLink Sprint
AS1          652      437      215    33.0%   GNTY-1 Genuity
AS4814       225       15      210    93.3%   CHINANET-BEIJING-AP China
                                               Telecom (Group)Beijing
                                               Telecom CompanyBeijing China
AS705        409      201      208    50.9%   ASN-ALTERNET UUNET
                                               Technologies, Inc.
AS22927      215       20      195    90.7%   AR-TEAR2-LACNIC TELEFONICA DE
                                               ARGENTINA
AS6595       248       57      191    77.0%   DODDSEUR DoD Education
                                               Activity Network Assistance
                                               Center
AS17676      224       34      190    84.8%   GIGAINFRA APNIC ASN block
AS690        518      329      189    36.5%   NSFNET-T3-RT-AS Merit Network
                                               Inc.
AS4134       293      111      182    62.1%   ERX-CHINALINK Data
                                               Communications Bureau
AS17557      293      115      178    60.8%   PKTELECOM-AS-AP APNIC ASN
                                               block
AS6198       396      221      175    44.2%   BATI-MIA BellSouth Network
                                               Solutions, Inc
AS2048       262       89      173    66.0%   LANET-1 State of Louisiana
AS2548       438      270      168    38.4%   ICIX-MD-AS Business Internet,
                                               Inc.
AS174        298      133      165    55.4%   PSINET PSINet Inc.

Total      16812     8589     8223    48.9%   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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