This report has been generated at Fri Jan 3 21:45:27 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 27-12-02 117120 84759 28-12-02 117172 84857 29-12-02 117391 84760 30-12-02 117247 84955 31-12-02 117450 85024 01-01-03 117552 85059 02-01-03 117648 85132 03-01-03 117672 85168 AS Summary 14290 Number of ASes in routing system 5618 Number of ASes announcing only one prefix 1610 Largest number of prefixes announced by an AS AS701 : ALTERNET-AS UUNET Technologies, Inc. 73047040 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'). --- 03Jan03 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 117812 85155 32657 27.7% All ASes AS3908 1173 689 484 41.3% SUPERNETASBLK SuperNet, Inc. AS701 1610 1195 415 25.8% ALTERNET-AS UUNET Technologies, Inc. AS18566 414 5 409 98.8% COVAD Covad Communications AS7018 1430 1029 401 28.0% ATT-INTERNET4 AT&T WorldNet Services AS4323 532 188 344 64.7% TW-COMM Time Warner Communications, Inc. AS7843 622 301 321 51.6% ADELPHIA-AS Adelphia Corp. AS1221 1146 829 317 27.7% ASN-TELSTRA Telstra Pty Ltd AS6197 455 150 305 67.0% BATI-ATL BellSouth Network Solutions, Inc AS1239 976 687 289 29.6% SPRINTLINK Sprint AS6347 368 85 283 76.9% DIAMOND SAVVIS Communications Corporation AS4355 407 136 271 66.6% ERMS-EARTHLNK EARTHLINK, INC AS22927 289 22 267 92.4% AR-TEAR2-LACNIC TELEFONICA DE ARGENTINA AS7046 552 291 261 47.3% UUNET-CUSTOMER UUNET Technologies, Inc. AS705 422 188 234 55.5% ASN-ALTERNET UUNET Technologies, Inc. AS4814 246 15 231 93.9% CHINANET-BEIJING-AP China Telecom (Group) AS6198 423 200 223 52.7% BATI-MIA BellSouth Network Solutions, Inc AS1 659 437 222 33.7% GNTY-1 Genuity AS17676 231 26 205 88.7% GIGAINFRA XTAGE CORPORATION AS22291 226 29 197 87.2% CHARTER-LA Charter Communications AS690 513 319 194 37.8% MERIT-AS-27 Merit Network Inc. AS4151 325 134 191 58.8% USDA-1 USDA AS6140 315 125 190 60.3% IMPSAT-USA ImpSat AS209 517 335 182 35.2% ASN-QWEST Qwest AS4134 290 108 182 62.8% ERX-CHINALINK Data Communications Bureau AS852 627 446 181 28.9% ASN852 Telus Advanced Communications AS2048 254 84 170 66.9% LANET-1 State of Louisiana AS2386 387 229 158 40.8% INS-AS AT&T Data Communications Services AS6327 185 34 151 81.6% SHAWFIBER Shaw Fiberlink Limited AS17557 324 179 145 44.8% PKTELECOM-AS-AP Pakistan Telecom AS3215 313 174 139 44.4% AS3215 France Telecom Transpac Total 16231 8669 7562 46.6% Top 30 total Please see http://www.cidr-report.org for the full report ------------------------------------ Copies of this report are mailed to: nanog@merit.edu eof-list@ripe.net apops@lists.apnic.net routing-wg@ripe.net afnog@afnog.org