This report has been generated at Fri Mar 21 21:46:30 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 14-03-03 120659 86373 15-03-03 120724 85975 16-03-03 120525 85886 17-03-03 120567 85987 18-03-03 120637 86171 19-03-03 120704 86222 20-03-03 120817 86331 21-03-03 120815 86377 AS Summary 14780 Number of ASes in routing system 5842 Number of ASes announcing only one prefix 1555 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 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'). --- 21Mar03 --- ASnum NetsNow NetsAggr NetGain % Gain Description Table 120844 86356 34488 28.5% All ASes AS3908 1097 536 561 51.1% SUPERNETASBLK SuperNet, Inc. AS18566 505 13 492 97.4% COVAD Covad Communications AS4151 545 108 437 80.2% USDA-1 USDA AS701 1555 1126 429 27.6% ALTERNET-AS UUNET Technologies, Inc. AS7843 614 214 400 65.1% ADELPHIA-AS Adelphia Corp. AS4323 555 173 382 68.8% TW-COMM Time Warner Communications, Inc. AS7018 1353 982 371 27.4% ATT-INTERNET4 AT&T WorldNet Services AS1221 1104 808 296 26.8% ASN-TELSTRA Telstra Pty Ltd AS22927 295 14 281 95.3% AR-TEAR2-LACNIC TELEFONICA DE ARGENTINA AS1239 972 692 280 28.8% SPRINTLINK Sprint AS1 705 430 275 39.0% GNTY-1 Genuity AS6197 475 202 273 57.5% BATI-ATL BellSouth Network Solutions, Inc AS4355 385 119 266 69.1% ERMS-EARTHLNK EARTHLINK, INC AS6198 448 183 265 59.2% BATI-MIA BellSouth Network Solutions, Inc AS705 457 203 254 55.6% ASN-ALTERNET UUNET Technologies, Inc. AS4814 264 15 249 94.3% CHINANET-BEIJING-AP China Telecom (Group) AS2386 496 275 221 44.6% INS-AS AT&T Data Communications Services AS27364 278 69 209 75.2% ACS-INTERNET Armstrong Cable Services AS17676 233 29 204 87.6% GIGAINFRA XTAGE CORPORATION AS22291 243 48 195 80.2% CHARTER-LA Charter Communications AS4134 310 119 191 61.6% CHINANET-BACKBONE No.31,Jin-rong Street AS209 531 341 190 35.8% ASN-QWEST Qwest AS690 504 314 190 37.7% MERIT-AS-27 Merit Network Inc. AS6347 370 194 176 47.6% DIAMOND SAVVIS Communications Corporation AS3561 517 342 175 33.8% CWUSA Cable & Wireless USA AS2048 259 87 172 66.4% LANET-1 State of Louisiana AS17557 374 211 163 43.6% PKTELECOM-AS-AP Pakistan Telecom AS22773 191 32 159 83.2% CCINET-2 Cox Communications Inc. Atlanta AS7303 242 89 153 63.2% AR-TAST-LACNIC Telecom Argentina Stet-France Telecom S.A. AS8372 182 30 152 83.5% COLT-UK-AS COLT Internet UK Access Network. Total 16059 7998 8061 50.2% 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