The Cidr Report
Tony Bates
tbates at cisco.com
Sat Jun 23 06:00:02 UTC 2001
This is an auto-generated mail on Fri Jun 22 23:00:00 PDT 2001
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A summary of the last weeks changes in terms of withdrawn and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 GX Networks 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 22Jun01
0) General Status
Table History
-------------
Date Prefixes
150601 101429
160601 101413
170601 101455
180601 101185
190601 101168
200601 101266
210601 101030
220601 101078
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: 11056
Number of ASes announcing only one prefix: 6521 (3719 cidr, 2802 classful)
Largest number of cidr routes: 1030 announced by AS701
Largest number of classful routes: 1425 announced by AS701
1) Gains by aggregating at the origin AS level
--- 22Jun01 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS1221 1363 1022 341 25.0% TELSTRA-AS
AS701 1425 1226 199 14.0% Alternet
AS4755 261 140 121 46.4% Videsh Sanchar Nigam Ltd. Autonom
AS4293 398 283 115 28.9% part of AS assignment AS4287 - AS
AS6595 157 58 99 63.1% DoD Education Activity Network As
AS6429 203 105 98 48.3% ATT LA Internet Chile
AS705 238 142 96 40.3% part of AS assignment AS701 - AS7
AS13999 103 11 92 89.3% Mega Cable S.A. de C.V.
AS7018 725 642 83 11.4% AT&T WorldNet Service Backbone
AS4151 158 77 81 51.3% part of AS assignment AS4151 - AS
AS8013 293 218 75 25.6% PSINet Ltd. Canada
AS577 250 177 73 29.2% Bell Advanced Communications Inc.
AS6471 114 51 63 55.3% ENTEL CHILE S.A.
AS3464 152 90 62 40.8% Alabama Research and Education Ne
AS724 217 156 61 28.1% part of AS assignment AS721 - AS7
AS7046 303 242 61 20.1% UUNET Technologies, Inc.
AS1 591 532 59 10.0% GTE Internetworking
AS16758 63 6 57 90.5% IKON Office Solutions
AS1239 445 390 55 12.4% SprintLink Backbone
AS2149 326 272 54 16.6% PSINET-2
AS3908 203 150 53 26.1% Supernet, Inc.
AS226 143 90 53 37.1% Los Nettos
AS6413 66 14 52 78.8% Southern Online Systems, Inc.
AS4323 236 184 52 22.0% Time Warner Telecom Internet
AS5106 94 43 51 54.3% Ameritech Advanced Data Services,
AS17561 112 61 51 45.5% Internet service provision to Wes
AS9842 54 5 49 90.7% Lotte Data Communication Company
AS852 209 161 48 23.0% Telus Advanced Communications
AS855 143 97 46 32.2% part of AS assignment AS853 - AS1
AS3602 225 179 46 20.4% Sprint Canada Inc.
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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