The Cidr Report
Tony Bates
tbates at cisco.com
Fri Oct 22 19:00:04 UTC 1999
This is an auto-generated mail on Fri Oct 22 12:00:01 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A summary of the last weeks changes in terms of withdrawn and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 22Oct99
0) General Status
Table History
-------------
Date Prefixes
151099 65450
161099 65076
171099 65195
181099 65279
191099 65291
201099 65598
211099 65550
221099 65598
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 110.30.236.0/24 from AS577
AS Summary
----------
Number of ASes in routing system: 5854
Number of ASes announcing only one prefix: 3086 (1688 cidr, 1398 classful)
Largest number of cidr routes: 583 announced by AS701
Largest number of classful routes: 945 announced by AS701
1) Gains by aggregating at the origin AS level
--- 22Oct99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 383 144 239 62.4% BCnet Backbone
AS719 733 567 166 22.6% LANLINK autonomous system
AS7046 397 260 137 34.5% UUNET-CUSTOMER
AS9269 139 15 124 89.2% Hong Kong CTI
AS2609 128 8 120 93.8% EUnet-TN
AS1221 623 513 110 17.7% TELSTRA-AS
AS6944 124 20 104 83.9% RapidSite, Inc.
AS174 573 483 90 15.7% Performance Systems International
AS7657 249 161 88 35.3% The Internet Group Limited
AS4293 228 142 86 37.7% Internal ASN for C&W
AS577 265 180 85 32.1% Bell Canada Backbone
AS7496 113 36 77 68.1% Power Up
AS7545 140 64 76 54.3% TPG Internet Pty Ltd
AS3749 140 64 76 54.3% TECNET
AS4200 184 110 74 40.2% AGIS (Apex Global Information Ser
AS4740 340 288 52 15.3% Ozemail Pty Ltd (ASN-OZEMAIL)
AS209 314 265 49 15.6% Qwest Communications
AS684 92 46 46 50.0% Manitoba Regional Network Backbon
AS701 945 900 45 4.8% Alternet
AS816 224 181 43 19.2% UUNET Canada (ASN-UUNETCA-AS4)
AS549 221 178 43 19.5% ONet Backbone
AS2493 134 93 41 30.6% iSTAR Internet, Inc.
AS9304 54 15 39 72.2% Hutchcity
AS6528 45 7 38 84.4% WORLD-LYNX
AS4755 97 63 34 35.1% Videsh Sanchar Nigam Ltd. India
AS1 497 463 34 6.8% GTE Internetworking
AS6172 146 113 33 22.6% HOME-NET-1
AS3737 99 66 33 33.3% PenTeleData Inc. (ASN-PTD)
AS1785 236 204 32 13.6% NYSERNet Backbone
AS9453 33 2 31 93.9% Soongsil University
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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