The Cidr Report
Tony Bates
tbates at cisco.com
Fri Apr 30 19:00:02 UTC 1999
This is an auto-generated mail on Fri Apr 30 12:00:00 PDT 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A summary of the last weeks changes in terms of withdrawn and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 30Apr99
0) General Status
Table History
-------------
Date Prefixes
230499 58766
240499 58380
250499 58344
260499 58454
270499 58458
280499 58561
290499 58602
300499 58568
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 71.0.2.0/24 from AS1239
*** Bogus 221.43.160.0/19 from AS12323
AS Summary
----------
Number of ASes in routing system: 4878
Number of ASes announcing only one prefix: 2461 (1329 cidr, 1132 classful)
Largest number of cidr routes: 376 announced by AS701
Largest number of classful routes: 799 announced by AS701
1) Gains by aggregating at the origin AS level
--- 30Apr99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 360 148 212 58.9% BCnet Backbone
AS577 292 182 110 37.7% Bell Canada Backbone
AS4293 289 182 107 37.0% IMCI
AS174 603 502 101 16.7% Performance Systems International
AS4755 175 87 88 50.3% Videsh Sanchar Nigam Ltd. India
AS2493 211 126 85 40.3% iSTAR Internet, Inc.
AS4200 167 94 73 43.7% AGIS (Apex Global Information Ser
AS3749 136 63 73 53.7% TECNET
AS7657 193 121 72 37.3% The Internet Group Limited
AS1267 94 24 70 74.5% IUNET-AS
AS7496 98 29 69 70.4% Power Up
AS1239 550 485 65 11.8% SprintLink Backbone
AS7545 111 47 64 57.7% TPG Internet Pty Ltd
AS1785 384 321 63 16.4% NYSERNet Backbone
AS7046 264 202 62 23.5% UUNET-CUSTOMER
AS10928 112 50 62 55.4% UNKNOWN
AS1221 451 392 59 13.1% AARNET-AS
AS4740 329 272 57 17.3% Ozemail Pty Ltd (ASN-OZEMAIL)
AS9269 66 10 56 84.8% Hong Kong CTI
AS3493 238 184 54 22.7% INTERLINK
AS719 474 421 53 11.2% LANLINK autonomous system
AS72 93 41 52 55.9% Schlumberger Information Network
AS803 79 35 44 55.7% SaskNet Backbone
AS5674 80 36 44 55.0% PBI-NET-BLK
AS3737 109 71 38 34.9% PenTeleData Inc. (ASN-PTD)
AS1 499 465 34 6.8% BBNPLANET
AS7122 110 78 32 29.1% MTS ADVANCED Network Policy
AS4307 32 1 31 96.9% SVINET-1
AS2907 209 178 31 14.8% SINET
AS11515 32 1 31 96.9% 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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