The Cidr Report
Tony Bates
tbates at cisco.com
Fri Mar 12 20:00:04 UTC 1999
This is an auto-generated mail on Fri Mar 12 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A summary of the last weeks changes in terms of withdrawn and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 12Mar99
0) General Status
Table History
-------------
Date Prefixes
050399 56665
060399 56702
070399 56723
080399 56793
090399 56901
100399 56823
110399 57143
120399 56938
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 123.217.230.0/24 from AS174
*** Bogus 124.188.32.0/19 from AS1239
AS Summary
----------
Number of ASes in routing system: 4654
Number of ASes announcing only one prefix: 2308 (1246 cidr, 1062 classful)
Largest number of cidr routes: 372 announced by AS701
Largest number of classful routes: 863 announced by AS701
1) Gains by aggregating at the origin AS level
--- 12Mar99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 358 146 212 59.2% BCnet Backbone
AS2493 268 151 117 43.7% iSTAR Internet, Inc.
AS174 645 530 115 17.8% Performance Systems International
AS11305 116 8 108 93.1% UNKNOWN
AS4755 158 76 82 51.9% Videsh Sanchar Nigam Ltd. India
AS3749 138 62 76 55.1% TECNET
AS4293 210 139 71 33.8% IMCI
AS1267 94 24 70 74.5% IUNET-AS
AS4200 162 96 66 40.7% AGIS (Apex Global Information Ser
AS7496 95 31 64 67.4% Power Up
AS7545 109 46 63 57.8% TPG Internet Pty Ltd
AS4740 386 323 63 16.3% Ozemail Pty Ltd (ASN-OZEMAIL)
AS1221 423 362 61 14.4% AARNET-AS
AS7046 266 206 60 22.6% UUNET-CUSTOMER
AS1239 516 459 57 11.0% SprintLink Backbone
AS10928 106 51 55 51.9% UNKNOWN
AS72 90 38 52 57.8% Schlumberger Information Network
AS7657 153 102 51 33.3% The Internet Group Limited
AS3493 228 177 51 22.4% INTERLINK
AS577 222 172 50 22.5% Bell Canada Backbone
AS719 453 406 47 10.4% LANLINK autonomous system
AS5674 79 35 44 55.7% PBI-NET-BLK
AS852 175 135 40 22.9% AGT Advance Communication
AS803 73 37 36 49.3% SaskNet Backbone
AS701 863 827 36 4.2% Alternet
AS7745 39 4 35 89.7% BIGSKY-AS
AS7122 111 78 33 29.7% MTS ADVANCED Network Policy
AS1785 248 216 32 12.9% NYSERNet Backbone
AS1 508 476 32 6.3% BBNPLANET
AS7390 36 5 31 86.1% NLSLAN
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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