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The Cidr Report
This report has been generated at Fri Feb 21 21:46:27 2003 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
14-02-03 119071 85433
15-02-03 119072 85385
16-02-03 118946 85348
17-02-03 118884 85299
18-02-03 118939 85352
19-02-03 119053 85338
20-02-03 119156 85478
21-02-03 119400 85502
AS Summary
14614 Number of ASes in routing system
5749 Number of ASes announcing only one prefix
1577 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
Possible Bogus Routes
10.0.0.0/8 AS4637 REACH Reach Network Border AS
192.168.0.0/16 AS4637 REACH Reach Network Border AS
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').
--- 21Feb03 ---
ASnum NetsNow NetsAggr NetGain % Gain Description
Table 119491 85471 34020 28.5% All ASes
AS3908 1062 565 497 46.8% SUPERNETASBLK SuperNet, Inc.
AS18566 482 6 476 98.8% COVAD Covad Communications
AS701 1577 1145 432 27.4% ALTERNET-AS UUNET
Technologies, Inc.
AS4151 524 92 432 82.4% USDA-1 USDA
AS7018 1427 1034 393 27.5% ATT-INTERNET4 AT&T WorldNet
Services
AS4323 529 170 359 67.9% TW-COMM Time Warner
Communications, Inc.
AS7843 569 234 335 58.9% ADELPHIA-AS Adelphia Corp.
AS7046 578 246 332 57.4% UUNET-CUSTOMER UUNET
Technologies, Inc.
AS6197 478 158 320 66.9% BATI-ATL BellSouth Network
Solutions, Inc
AS1221 1119 821 298 26.6% ASN-TELSTRA Telstra Pty Ltd
AS4355 402 120 282 70.1% ERMS-EARTHLNK EARTHLINK, INC
AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE
ARGENTINA
AS1239 960 680 280 29.2% SPRINTLINK Sprint
AS705 447 194 253 56.6% ASN-ALTERNET UUNET
Technologies, Inc.
AS4814 261 15 246 94.3% CHINANET-BEIJING-AP China
Telecom (Group)
AS1 666 435 231 34.7% GNTY-1 Genuity
AS6347 330 101 229 69.4% DIAMOND SAVVIS Communications
Corporation
AS6198 433 204 229 52.9% BATI-MIA BellSouth Network
Solutions, Inc
AS22291 243 32 211 86.8% CHARTER-LA Charter
Communications
AS17676 227 26 201 88.5% GIGAINFRA XTAGE CORPORATION
AS690 498 308 190 38.2% MERIT-AS-27 Merit Network Inc.
AS209 523 335 188 35.9% ASN-QWEST Qwest
AS4134 304 117 187 61.5% CHINANET-BACKBONE
No.31,Jin-rong Street
AS2386 443 263 180 40.6% INS-AS AT&T Data
Communications Services
AS2048 260 87 173 66.5% LANET-1 State of Louisiana
AS852 604 445 159 26.3% ASN852 Telus Advanced
Communications
AS7303 240 90 150 62.5% AR-TAST-LACNIC Telecom
Argentina Stet-France Telecom
S.A.
AS17557 340 190 150 44.1% PKTELECOM-AS-AP Pakistan
Telecom
AS22773 181 31 150 82.9% CCINET-2 Cox Communications
Inc. Atlanta
AS6140 283 137 146 51.6% IMPSAT-USA ImpSat
Total 16285 8295 7990 49.1% 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 apops.net
routing-wg at ripe.net
afnog at afnog.org
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