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January 1999

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The Cidr Report
by Tony Bates 08 Jan '99

08 Jan '99

This is an auto-generated mail on Fri Jan 8 12:00:00 PST 1999 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is possible even larger reduction should be possible. 2) Weekly Delta A summary of the last weeks changes in terms of withdrawn and added routes.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 08Jan99 0) General Status Table History ------------- Date Prefixes 010199 55011 020199 55001 030199 54615 040199 54770 050199 54954 060199 54958 070199 55003 080199 54976 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: 4389 Number of ASes announcing only one prefix: 2167 (1158 cidr, 1009 classful) Largest number of cidr routes: 351 announced by AS3561 Largest number of classful routes: 1010 announced by AS701 1) Gains by aggregating at the origin AS level --- 08Jan99 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS271 391 145 246 62.9% UNKNOWN AS3749 231 71 160 69.3% UNKNOWN AS701 1010 861 149 14.8% UNKNOWN AS2493 326 179 147 45.1% UNKNOWN AS174 669 546 123 18.4% UNKNOWN AS5668 131 35 96 73.3% UNKNOWN AS4200 188 97 91 48.4% UNKNOWN AS4755 150 68 82 54.7% UNKNOWN AS1267 111 30 81 73.0% UNKNOWN AS4293 207 135 72 34.8% UNKNOWN AS549 220 154 66 30.0% UNKNOWN AS4740 393 329 64 16.3% UNKNOWN AS8517 133 74 59 44.4% UNKNOWN AS1221 381 323 58 15.2% UNKNOWN AS7046 251 195 56 22.3% UNKNOWN AS72 89 37 52 58.4% UNKNOWN AS7657 140 89 51 36.4% UNKNOWN AS3493 248 197 51 20.6% UNKNOWN AS7545 114 64 50 43.9% UNKNOWN AS1239 530 483 47 8.9% UNKNOWN AS10928 95 48 47 49.5% UNKNOWN AS7496 74 28 46 62.2% UNKNOWN AS577 205 160 45 22.0% UNKNOWN AS852 175 133 42 24.0% UNKNOWN AS719 452 410 42 9.3% UNKNOWN AS3221 84 42 42 50.0% UNKNOWN AS803 71 35 36 50.7% UNKNOWN AS7122 109 75 34 31.2% UNKNOWN AS1 503 470 33 6.6% UNKNOWN AS6897 46 14 32 69.6% UNKNOWN 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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The Cidr Report
by Tony Bates 01 Jan '99

01 Jan '99

This is an auto-generated mail on Fri Jan 1 12:00:00 PST 1999 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 01Jan99 0) General Status Table History ------------- Date Prefixes 251298 54839 261298 54849 271298 54731 281298 54848 291298 54977 301298 55085 311298 55006 010199 55011 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: 4378 Number of ASes announcing only one prefix: 2165 (1152 cidr, 1013 classful) Largest number of cidr routes: 351 announced by AS3561 Largest number of classful routes: 1008 announced by AS701 1) Gains by aggregating at the origin AS level --- 01Jan99 --- ASnum NetsNow NetsCIDR NetGain % Gain Description AS271 392 146 246 62.8% BCnet Backbone AS3749 228 75 153 67.1% TECNET AS2493 327 180 147 45.0% iSTAR Internet, Inc. AS701 1008 864 144 14.3% Alternet AS1785 541 403 138 25.5% NYSERNet Backbone AS174 671 548 123 18.3% Performance Systems International AS5668 132 36 96 72.7% Century Telephone Inc. AS4200 190 97 93 48.9% AGIS (Apex Global Information Ser AS4755 148 66 82 55.4% Videsh Sanchar Nigam Ltd. India AS1267 107 29 78 72.9% IUNET-AS AS4293 208 136 72 34.6% IMCI AS549 220 154 66 30.0% ONet Backbone AS4740 382 321 61 16.0% Ozemail Pty Ltd (ASN-OZEMAIL) AS8517 129 72 57 44.2% UNKNOWN AS1221 378 321 57 15.1% AARNET-AS AS7046 248 192 56 22.6% UUNET-CUSTOMER AS7545 115 65 50 43.5% TPG Internet Pty Ltd AS1239 533 484 49 9.2% SprintLink Backbone AS10928 93 44 49 52.7% UNKNOWN AS72 88 40 48 54.5% Schlumberger Information Network AS7657 138 93 45 32.6% The Internet Group Limited AS7496 73 28 45 61.6% Power Up AS577 208 163 45 21.6% Bell Canada Backbone AS852 174 132 42 24.1% AGT Advance Communication AS719 450 408 42 9.3% LANLINK-AS AS3221 84 42 42 50.0% RIPE-ASNBLOCK4 AS803 71 35 36 50.7% SaskNet Backbone AS7122 109 75 34 31.2% MTS ADVANCED Network Policy AS6897 46 14 32 69.6% RIPE-ASNBLOCK6 AS6332 100 69 31 31.0% TELNOR 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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