The Cidr Report
Tony Bates
tbates at cisco.com
Fri May 28 19:00:04 UTC 1999
This is an auto-generated mail on Fri May 28 12:00:02 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A summary of the last weeks changes in terms of withdrawn and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 28May99
0) General Status
Table History
-------------
Date Prefixes
210599 59570
220599 59339
230599 59259
240599 59294
250599 59763
260599 60611
270599 60580
280599 60794
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 221.43.160.0/19 from AS12323
AS Summary
----------
Number of ASes in routing system: 5031
Number of ASes announcing only one prefix: 2576 (1405 cidr, 1171 classful)
Largest number of cidr routes: 406 announced by AS701
Largest number of classful routes: 1226 announced by AS209
1) Gains by aggregating at the origin AS level
--- 28May99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS209 1226 567 659 53.8% Qwest Communications
AS271 358 147 211 58.9% BCnet Backbone
AS4293 273 168 105 38.5% IMCI
AS174 582 488 94 16.2% Performance Systems International
AS4755 172 86 86 50.0% Videsh Sanchar Nigam Ltd. India
AS577 255 176 79 31.0% Bell Canada Backbone
AS4200 169 93 76 45.0% AGIS (Apex Global Information Ser
AS3749 136 62 74 54.4% TECNET
AS1267 94 24 70 74.5% IUNET-AS
AS7496 99 33 66 66.7% Power Up
AS7545 112 48 64 57.1% TPG Internet Pty Ltd
AS7122 139 78 61 43.9% MTS ADVANCED Network Policy
AS1221 457 396 61 13.3% TELSTRA-AS
AS7657 179 122 57 31.8% The Internet Group Limited
AS10928 111 54 57 51.4% UNKNOWN
AS9269 65 10 55 84.6% Hong Kong CTI
AS72 94 39 55 58.5% Schlumberger Information Network
AS4740 325 270 55 16.9% Ozemail Pty Ltd (ASN-OZEMAIL)
AS719 474 420 54 11.4% LANLINK autonomous system
AS1239 526 472 54 10.3% SprintLink Backbone
AS2493 175 122 53 30.3% iSTAR Internet, Inc.
AS7046 265 213 52 19.6% UUNET-CUSTOMER
AS3737 161 111 50 31.1% PenTeleData Inc. (ASN-PTD)
AS803 73 37 36 49.3% SaskNet Backbone
AS1 495 460 35 7.1% BBNPLANET
AS6172 153 120 33 21.6% HOME-NET-1
AS1785 246 214 32 13.0% NYSERNet Backbone
AS549 163 132 31 19.0% ONet Backbone
AS4307 32 1 31 96.9% SVINET-1
AS3549 133 102 31 23.3% Frontier GlobalCenter
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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