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August 1998

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The Cidr Report
by Tony Bates 07 Aug '98

07 Aug '98

This is an auto-generated mail on Fri Aug 7 12:00:00 PDT 1998 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is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes.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 07Aug98 0) General Status Table History ------------- Date Prefixes 310798 52941 010898 52807 020898 52843 030898 52915 040898 52856 050898 52828 060898 52871 070898 52903 Check http://www.employees.org/~tbates/cidr.plot.html for a plot of the table history. Possible Bogus Routes --------------------- AS Summary ---------- Number of ASes in routing system: 3804 Number of ASes announcing only one prefix: 1844 (971 cidr, 873 classful) Largest number of cidr routes: 343 announced by AS3561 Largest number of classful routes: 1137 announced by AS701 1) Gains by aggregating at the origin AS level --- 07Aug98 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS3602 551 320 231 41.9% Sprint Canada Inc. AS701 1137 934 203 17.9% Alternet AS271 333 143 190 57.1% BCnet Backbone AS4293 438 254 184 42.0% IMCI AS2493 406 240 166 40.9% iSTAR Internet, Inc. AS3749 222 69 153 68.9% TECNET AS174 719 587 132 18.4% Performance Systems International AS4200 192 100 92 47.9% AGIS (Apex Global Information Ser AS2685 243 157 86 35.4% IBM Global Network - US AS5668 129 47 82 63.6% Century Telephone Inc. AS4755 121 45 76 62.8% Videsh Sanchar Nigam Ltd. India AS3221 112 42 70 62.5% EENet Autonomous System AS7046 226 160 66 29.2% UNKNOWN AS3804 220 155 65 29.5% Bell Solutions AS4740 403 342 61 15.1% ASN-OZEMAIL (Ozemail Pty Ltd) AS10928 101 46 55 54.5% UNKNOWN AS3403 181 127 54 29.8% TIAC AS549 204 153 51 25.0% ONet Backbone AS8517 122 72 50 41.0% ULAKNET-ASN AS6335 68 19 49 72.1% NTRNET AS72 85 37 48 56.5% Schlumberger Information Network AS719 459 412 47 10.2% LANLINK autonomous system AS1239 532 485 47 8.8% SprintLink Backbone AS4539 70 27 43 61.4% NETROPOLIS AS1785 298 255 43 14.4% NYSERNet Backbone AS852 156 116 40 25.6% AGT Advance Communication AS6181 66 26 40 60.6% FUSE-NET AS10921 57 19 38 66.7% KIHNETWORK AS762 117 80 37 31.6% WELLFLEET-AS AS10459 47 10 37 78.7% WANSASN 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

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