This is an auto-generated mail on Fri May 4 23:00:00 PDT 2001 It is not checked before it leaves my workstation. However, hopefully you will find this report interesting and will take the time to look through this to see if you can improve the amount of aggregation you perform. The report is split into sections: 0) General Status List the route table history for the last week, list any possibly bogus routes seen and give some status on ASes. 1) Gains by aggregating at the origin AS level This lists the "Top 30" players who if they decided to aggregate their announced classful prefixes at the origin AS level could make a significant difference in the reduction of the current size of the Internet routing table. This calculation does not take into account the inclusion of holes when forming an aggregate so it is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes. Please note that this is only a snapshot but does give some indication of ASes participating in CIDR. Clearly, it is generally a good thing to see a large amont of withdrawls. 3) Interesting aggregates Interesting here means not an aggregate made as a set of classful routes. Thanks to xara.net for giving me access to their routing tables once a day. Please send any comments about this report directly to me. Check http://www.employees.org/~tbates/cidr-report.html for a daily update of this report.  ------------------------------------------------------------------------------ CIDR REPORT for 04May01 0) General Status Table History ------------- Date Prefixes 270401 100797 280401 102051 290401 102329 300401 102763 010501 103252 020501 104027 030501 104798 040501 104512 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- *** Bogus 218.6.128.0/17 from AS4134 AS Summary ---------- Number of ASes in routing system: 10668 Number of ASes announcing only one prefix: 6344 (3599 cidr, 2745 classful) Largest number of cidr routes: 2588 announced by AS2149 Largest number of classful routes: 1404 announced by AS701  1) Gains by aggregating at the origin AS level --- 04May01 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS1221 1396 1034 362 25.9% TELSTRA-AS AS701 1404 1217 187 13.3% Alternet AS2149 613 452 161 26.3% PSINET-2 AS705 380 250 130 34.2% part of AS assignment AS701 - AS7 AS4151 258 146 112 43.4% part of AS assignment AS4151 - AS AS4293 392 283 109 27.8% part of AS assignment AS4287 - AS AS6429 215 107 108 50.2% ATT LA Internet Chile AS6595 164 62 102 62.2% autonomous system number assigned AS13999 104 8 96 92.3% autonomous system number assigned AS4755 235 145 90 38.3% part of AS assignment AS4608 - AS AS8013 343 258 85 24.8% autonomous system number assigned AS7018 701 617 84 12.0% AT&T WorldNet Service Backbone AS577 236 167 69 29.2% autonomous system number assigned AS174 427 361 66 15.5% Performance Systems International AS6471 113 49 64 56.6% autonomous system number assigned AS5106 100 37 63 63.0% autonomous system number assigned AS3464 153 91 62 40.5% Alabama Research and Education Ne AS3749 119 58 61 51.3% autonomous system number assigned AS3602 254 195 59 23.2% Sprint Canada Inc. AS724 205 147 58 28.3% part of AS assignment AS721 - AS7 AS11252 91 33 58 63.7% autonomous system number assigned AS1 609 551 58 9.5% GTE Internetworking AS16758 63 6 57 90.5% autonomous system number assigned AS6413 67 11 56 83.6% autonomous system number assigned AS226 149 93 56 37.6% Los Nettos AS4323 232 179 53 22.8% Time Warner Telecom Internet AS17561 110 59 51 46.4% UNKNOWN AS852 206 157 49 23.8% autonomous system number assigned AS8151 183 137 46 25.1% autonomous system number assigned AS13544 68 22 46 67.6% autonomous system number assigned For the rest of the previous weeks gain information please see http://www.employees.org:80/~tbates/cidr-report.html  2) Weekly Delta Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report  3) Interesting aggregates Please see http://www.employees.org:80/~tbates/cidr-report.html for this part of the report