The Cidr Report
Tony Bates
tbates at cisco.com
Fri Nov 13 20:00:02 UTC 1998
This is an auto-generated mail on Fri Nov 13 12:00:00 PST 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A summary of the last weeks changes in terms of withdrawn and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 13Nov98
0) General Status
Table History
-------------
Date Prefixes
061198 53673
071198 53323
081198 53161
091198 53249
101198 53388
111198 53419
121198 53674
131198 53601
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: 4244
Number of ASes announcing only one prefix: 2088 (1113 cidr, 975 classful)
Largest number of cidr routes: 338 announced by AS3561
Largest number of classful routes: 975 announced by AS701
1) Gains by aggregating at the origin AS level
--- 13Nov98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 349 150 199 57.0% BCnet Backbone
AS1785 583 402 181 31.0% NYSERNet Backbone
AS3749 230 70 160 69.6% TECNET
AS2493 345 195 150 43.5% iSTAR Internet, Inc.
AS701 975 842 133 13.6% Alternet
AS174 690 562 128 18.6% Performance Systems International
AS4200 187 95 92 49.2% AGIS (Apex Global Information Ser
AS5668 127 40 87 68.5% Century Telephone Inc.
AS4293 207 135 72 34.8% IMCI
AS4755 128 64 64 50.0% Videsh Sanchar Nigam Ltd. India
AS549 221 159 62 28.1% ONet Backbone
AS4740 388 326 62 16.0% Ozemail Pty Ltd (ASN-OZEMAIL)
AS7046 265 205 60 22.6% UUNET-CUSTOMER
AS8517 127 72 55 43.3% ULAKNET-ASN
AS7545 117 65 52 44.4% TPG Internet Pty Ltd
AS6335 71 19 52 73.2% NTRNET
AS72 88 40 48 54.5% Schlumberger Information Network
AS1239 523 477 46 8.8% SprintLink Backbone
AS803 77 33 44 57.1% SaskNet Backbone
AS1221 354 310 44 12.4% AARNET-AS
AS7122 127 85 42 33.1% MTS ADVANCED Network Policy
AS3221 84 42 42 50.0% EENet Autonomous System
AS852 166 125 41 24.7% AGT Advance Communication
AS10928 91 50 41 45.1% UNKNOWN
AS3804 182 143 39 21.4% Bell Solutions
AS7496 66 33 33 50.0% Power Up
AS2707 65 32 33 50.8% WEC
AS6181 63 31 32 50.8% FUSE-NET
AS719 432 401 31 7.2% LANLINK autonomous system
AS4307 32 1 31 96.9% SVINET-1
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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