This report has been generated at Fri Jan 17 21:50:49 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 10-01-03 118118 85265 11-01-03 118137 85264 12-01-03 118098 85311 13-01-03 118022 85338 14-01-03 118150 85261 15-01-03 118309 85199 16-01-03 118188 85195 17-01-03 118250 85247 AS Summary 14387 Number of ASes in routing system 5650 Number of ASes announcing only one prefix 1586 Largest number of prefixes announced by an AS AS701 : ALTERNET-AS UUNET Technologies, Inc. 73080832 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'). --- 17Jan03 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 118475 85309 33166 28.0% All ASes AS3908 1187 693 494 41.6% SUPERNETASBLK SuperNet, Inc. AS18566 430 5 425 98.8% COVAD Covad Communications AS701 1586 1176 410 25.9% ALTERNET-AS UUNET Technologies, Inc. AS7018 1442 1043 399 27.7% ATT-INTERNET4 AT&T WorldNet Services AS4323 532 189 343 64.5% TW-COMM Time Warner Communications, Inc. AS7843 609 267 342 56.2% ADELPHIA-AS Adelphia Corp. AS6197 464 151 313 67.5% BATI-ATL BellSouth Network Solutions, Inc AS1221 1137 839 298 26.2% ASN-TELSTRA Telstra Pty Ltd AS1239 963 679 284 29.5% SPRINTLINK Sprint AS6347 366 85 281 76.8% DIAMOND SAVVIS Communications Corporation AS4355 408 133 275 67.4% ERMS-EARTHLNK EARTHLINK, INC AS4151 329 58 271 82.4% USDA-1 USDA AS7046 550 282 268 48.7% UUNET-CUSTOMER UUNET Technologies, Inc. AS22927 283 22 261 92.2% AR-TEAR2-LACNIC TELEFONICA DE ARGENTINA AS705 426 186 240 56.3% ASN-ALTERNET UUNET Technologies, Inc. AS4814 251 15 236 94.0% CHINANET-BEIJING-AP China Telecom (Group) AS6198 426 202 224 52.6% BATI-MIA BellSouth Network Solutions, Inc AS1 654 433 221 33.8% GNTY-1 Genuity AS17676 225 26 199 88.4% GIGAINFRA XTAGE CORPORATION AS22291 227 29 198 87.2% CHARTER-LA Charter Communications AS690 521 326 195 37.4% MERIT-AS-27 Merit Network Inc. AS6140 319 126 193 60.5% IMPSAT-USA ImpSat AS209 517 329 188 36.4% ASN-QWEST Qwest AS4134 296 112 184 62.2% ERX-CHINALINK Data Communications Bureau AS2048 260 86 174 66.9% LANET-1 State of Louisiana AS2386 410 243 167 40.7% INS-AS AT&T Data Communications Services AS852 608 446 162 26.6% ASN852 Telus Advanced Communications AS6327 185 34 151 81.6% SHAWFIBER Shaw Fiberlink Limited AS11492 297 155 142 47.8% CABLEONE CABLE ONE AS3215 314 174 140 44.6% AS3215 France Telecom Transpac Total 16222 8544 7678 47.3% 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