The Cidr Report
Tony Bates
tbates at cisco.com
Fri Feb 19 20:00:03 UTC 1999
This is an auto-generated mail on Fri Feb 19 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A summary of the last weeks changes in terms of withdrawn and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 19Feb99
0) General Status
Table History
-------------
Date Prefixes
120299 55713
130299 55907
140299 55818
150299 55997
160299 56035
170299 56178
180299 56403
190299 56528
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: 4569
Number of ASes announcing only one prefix: 2279 (1216 cidr, 1063 classful)
Largest number of cidr routes: 353 announced by AS701
Largest number of classful routes: 850 announced by AS701
1) Gains by aggregating at the origin AS level
--- 19Feb99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 353 138 215 60.9% BCnet Backbone
AS2493 273 155 118 43.2% iSTAR Internet, Inc.
AS174 652 536 116 17.8% Performance Systems International
AS11305 116 8 108 93.1% UNKNOWN
AS3749 149 65 84 56.4% TECNET
AS1267 107 29 78 72.9% IUNET-AS
AS4293 222 148 74 33.3% IMCI
AS4755 151 80 71 47.0% Videsh Sanchar Nigam Ltd. India
AS7046 280 215 65 23.2% UUNET-CUSTOMER
AS4200 161 98 63 39.1% AGIS (Apex Global Information Ser
AS4740 386 325 61 15.8% Ozemail Pty Ltd (ASN-OZEMAIL)
AS1239 521 464 57 10.9% SprintLink Backbone
AS1221 407 351 56 13.8% AARNET-AS
AS7545 110 55 55 50.0% TPG Internet Pty Ltd
AS7657 142 90 52 36.6% The Internet Group Limited
AS72 89 37 52 58.4% Schlumberger Information Network
AS10928 104 53 51 49.0% UNKNOWN
AS577 222 172 50 22.5% Bell Canada Backbone
AS7496 76 27 49 64.5% Power Up
AS719 456 410 46 10.1% LANLINK autonomous system
AS852 173 135 38 22.0% AGT Advance Communication
AS5674 64 27 37 57.8% PBI-NET-BLK
AS803 72 36 36 50.0% SaskNet Backbone
AS701 850 814 36 4.2% Alternet
AS6897 63 27 36 57.1% Global-One Spain
AS7122 112 77 35 31.2% MTS ADVANCED Network Policy
AS1785 249 217 32 12.9% NYSERNet Backbone
AS6332 97 66 31 32.0% TELNOR
AS4307 32 1 31 96.9% SVINET-1
AS2707 63 32 31 49.2% 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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