The Cidr Report
Tony Bates
tbates at cisco.com
Fri Jul 30 19:00:02 UTC 1999
This is an auto-generated mail on Fri Jul 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A summary of the last weeks changes in terms of withdrawn and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 30Jul99
0) General Status
Table History
-------------
Date Prefixes
230799 61494
240799 61486
250799 61391
260799 61592
270799 61488
280799 61707
290799 61808
300799 61912
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: 5372
Number of ASes announcing only one prefix: 2813 (1550 cidr, 1263 classful)
Largest number of cidr routes: 461 announced by AS701
Largest number of classful routes: 841 announced by AS701
1) Gains by aggregating at the origin AS level
--- 30Jul99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 348 147 201 57.8% BCnet Backbone
AS2609 121 28 93 76.9% EUnet-TN
AS174 578 486 92 15.9% Performance Systems International
AS1221 537 445 92 17.1% TELSTRA-AS
AS577 280 189 91 32.5% Bell Canada Backbone
AS3749 153 63 90 58.8% TECNET
AS4293 235 149 86 36.6% IMCI
AS7046 322 237 85 26.4% UUNET-CUSTOMER
AS4200 182 103 79 43.4% AGIS (Apex Global Information Ser
AS7545 141 66 75 53.2% TPG Internet Pty Ltd
AS7496 108 34 74 68.5% Power Up
AS7657 229 156 73 31.9% The Internet Group Limited
AS10928 119 49 70 58.8% UNKNOWN
AS9269 76 16 60 78.9% Hong Kong CTI
AS4755 138 79 59 42.8% Videsh Sanchar Nigam Ltd. India
AS6944 63 6 57 90.5% RapidSite, Inc.
AS4740 307 253 54 17.6% Ozemail Pty Ltd (ASN-OZEMAIL)
AS719 458 406 52 11.4% LANLINK autonomous system
AS2493 159 110 49 30.8% iSTAR Internet, Inc.
AS684 91 46 45 49.5% Manitoba Regional Network Backbon
AS803 78 34 44 56.4% SaskNet Backbone
AS549 215 172 43 20.0% ONet Backbone
AS3737 108 67 41 38.0% PenTeleData Inc. (ASN-PTD)
AS1785 253 215 38 15.0% NYSERNet Backbone
AS209 251 216 35 13.9% Qwest Communications
AS1 495 460 35 7.1% BBNPLANET
AS10724 42 8 34 81.0% UNKNOWN
AS6762 33 2 31 93.9% Telecom Italia international high
AS4307 32 1 31 96.9% SVINET-1
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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