The Cidr Report
Tony Bates
tbates at cisco.com
Fri Nov 27 20:00:02 UTC 1998
This is an auto-generated mail on Fri Nov 27 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A summary of the last weeks changes in terms of withdrawn and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 27Nov98
0) General Status
Table History
-------------
Date Prefixes
201198 54986
211198 55088
221198 55084
231198 55066
241198 55125
251198 55118
261198 54086
271198 54161
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: 4262
Number of ASes announcing only one prefix: 2087 (1105 cidr, 982 classful)
Largest number of cidr routes: 339 announced by AS3561
Largest number of classful routes: 1002 announced by AS701
1) Gains by aggregating at the origin AS level
--- 27Nov98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 349 153 196 56.2% BCnet Backbone
AS3749 229 73 156 68.1% TECNET
AS2493 341 193 148 43.4% iSTAR Internet, Inc.
AS701 1002 867 135 13.5% Alternet
AS1785 535 400 135 25.2% NYSERNet Backbone
AS174 686 555 131 19.1% Performance Systems International
AS4200 188 96 92 48.9% AGIS (Apex Global Information Ser
AS5668 126 39 87 69.0% Century Telephone Inc.
AS1267 109 30 79 72.5% IUNET-AS
AS4755 133 59 74 55.6% Videsh Sanchar Nigam Ltd. India
AS4293 207 135 72 34.8% IMCI
AS549 224 156 68 30.4% ONet Backbone
AS4740 390 330 60 15.4% Ozemail Pty Ltd (ASN-OZEMAIL)
AS8517 127 71 56 44.1% UNKNOWN
AS7046 256 200 56 21.9% UUNET-CUSTOMER
AS1221 382 327 55 14.4% AARNET-AS
AS6335 71 19 52 73.2% NTRNET
AS7545 117 66 51 43.6% TPG Internet Pty Ltd
AS72 88 40 48 54.5% Schlumberger Information Network
AS1239 529 481 48 9.1% SprintLink Backbone
AS7657 138 92 46 33.3% The Internet Group Limited
AS803 77 33 44 57.1% SaskNet Backbone
AS7496 72 30 42 58.3% Power Up
AS3221 84 42 42 50.0% RIPE-ASNBLOCK4
AS852 169 128 41 24.3% AGT Advance Communication
AS10928 89 48 41 46.1% UNKNOWN
AS719 440 402 38 8.6% LANLINK-AS
AS7122 115 77 38 33.0% MTS ADVANCED Network Policy
AS3804 157 124 33 21.0% Bell Solutions
AS2707 65 32 33 50.8% WEC
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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