This report has been generated at Fri Jan 24 21:45:50 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 17-01-03 118250 85350 18-01-03 118505 84955 19-01-03 117957 85033 20-01-03 118153 85036 21-01-03 118131 85084 22-01-03 118226 85008 23-01-03 118178 85134 24-01-03 118201 85092 AS Summary 14428 Number of ASes in routing system 5654 Number of ASes announcing only one prefix 1592 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'). --- 24Jan03 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 118323 85145 33178 28.0% All ASes AS3908 1185 694 491 41.4% SUPERNETASBLK SuperNet, Inc. AS18566 443 5 438 98.9% COVAD Covad Communications AS701 1592 1180 412 25.9% ALTERNET-AS UUNET Technologies, Inc. AS7018 1437 1036 401 27.9% ATT-INTERNET4 AT&T WorldNet Services AS7843 592 250 342 57.8% ADELPHIA-AS Adelphia Corp. AS4323 527 187 340 64.5% TW-COMM Time Warner Communications, Inc. AS6197 468 152 316 67.5% BATI-ATL BellSouth Network Solutions, Inc AS1221 1137 839 298 26.2% ASN-TELSTRA Telstra Pty Ltd AS6347 372 85 287 77.2% DIAMOND SAVVIS Communications Corporation AS1239 962 679 283 29.4% SPRINTLINK Sprint AS4355 408 133 275 67.4% ERMS-EARTHLNK EARTHLINK, INC AS7046 556 282 274 49.3% UUNET-CUSTOMER UUNET Technologies, Inc. AS4151 329 58 271 82.4% USDA-1 USDA AS22927 289 22 267 92.4% AR-TEAR2-LACNIC TELEFONICA DE ARGENTINA AS4814 261 15 246 94.3% CHINANET-BEIJING-AP China Telecom (Group) AS705 429 186 243 56.6% ASN-ALTERNET UUNET Technologies, Inc. AS852 678 445 233 34.4% ASN852 Telus Advanced Communications AS1 656 434 222 33.8% GNTY-1 Genuity AS6198 423 202 221 52.2% BATI-MIA BellSouth Network Solutions, Inc AS17676 227 28 199 87.7% GIGAINFRA XTAGE CORPORATION AS22291 228 29 199 87.3% CHARTER-LA Charter Communications AS690 521 326 195 37.4% MERIT-AS-27 Merit Network Inc. AS6140 317 125 192 60.6% IMPSAT-USA ImpSat AS209 520 332 188 36.2% ASN-QWEST Qwest AS4134 298 114 184 61.7% ERX-CHINALINK Data Communications Bureau AS2386 425 252 173 40.7% INS-AS AT&T Data Communications Services AS2048 260 89 171 65.8% LANET-1 State of Louisiana AS6327 186 35 151 81.2% SHAWFIBER Shaw Fiberlink Limited AS17557 329 182 147 44.7% PKTELECOM-AS-AP Pakistan Telecom AS11492 299 157 142 47.5% CABLEONE CABLE ONE Total 16354 8553 7801 47.7% 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