This report has been generated at Fri Apr 4 21:45:29 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 29-03-03 121022 86344 30-03-03 121098 86444 30-03-03 121192 86322 31-03-03 121111 86222 01-04-03 121043 86425 02-04-03 121298 86692 03-04-03 121290 86674 04-04-03 121205 86508 AS Summary 14872 Number of ASes in routing system 5874 Number of ASes announcing only one prefix 1557 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'). --- 04Apr03 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 121023 86497 34526 28.5% All ASes AS4151 612 75 537 87.7% USDA-1 USDA AS18566 516 12 504 97.7% COVAD Covad Communications AS701 1557 1113 444 28.5% ALTERNET-AS UUNET Technologies, Inc. AS7843 621 189 432 69.6% ADELPHIA-AS Adelphia Corp. AS3908 956 529 427 44.7% SUPERNETASBLK SuperNet, Inc. AS7018 1349 958 391 29.0% ATT-INTERNET4 AT&T WorldNet Services AS4323 565 181 384 68.0% TW-COMM Time Warner Communications, Inc. AS7132 727 409 318 43.7% SBIS-AS SBC Internet Services - Southwest AS1221 1108 811 297 26.8% ASN-TELSTRA Telstra Pty Ltd AS1239 960 679 281 29.3% SPRINTLINK Sprint AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE ARGENTINA AS6198 460 185 275 59.8% BATI-MIA BellSouth Network Solutions, Inc AS6197 475 202 273 57.5% BATI-ATL BellSouth Network Solutions, Inc AS4355 380 110 270 71.1% ERMS-EARTHLNK EARTHLINK, INC AS705 459 203 256 55.8% ALTERNET-AS UUNET Technologies, Inc. AS4814 269 15 254 94.4% CHINANET-BEIJING-AP China Telecom (Group) AS2386 499 277 222 44.5% INS-AS AT&T Data Communications Services AS17676 235 28 207 88.1% GIGAINFRA XTAGE CORPORATION AS27364 266 65 201 75.6% ACS-INTERNET Armstrong Cable Services AS11305 340 146 194 57.1% INTERLAND-NET1 Interland Incorporated AS22773 202 8 194 96.0% CCINET-2 Cox Communications Inc. Atlanta AS209 523 337 186 35.6% ASN-QWEST Qwest AS690 502 318 184 36.7% MERIT-AS-27 Merit Network Inc. AS22291 240 60 180 75.0% CHARTER-LA Charter Communications AS3561 515 338 177 34.4% CWUSA Cable & Wireless USA AS2048 258 87 171 66.3% LANET-1 State of Louisiana AS6347 368 201 167 45.4% DIAMOND SAVVIS Communications Corporation AS1 639 483 156 24.4% GNTY-1 Genuity AS6327 190 34 156 82.1% SHAWFIBER Shaw Fiberlink Limited AS6140 295 152 143 48.5% IMPSAT-USA ImpSat Total 16381 8219 8162 49.8% 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@apops.net routing-wg@ripe.net afnog@afnog.org