The Cidr Report
Tony Bates
tbates at cisco.com
Fri Aug 6 19:00:02 UTC 1999
This is an auto-generated mail on Fri Aug 6 12:00:00 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A summary of the last weeks changes in terms of withdrawn and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 06Aug99
0) General Status
Table History
-------------
Date Prefixes
300799 61912
310799 61846
010899 61817
020899 62029
030899 62101
040899 61977
050899 61856
060899 61906
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: 5397
Number of ASes announcing only one prefix: 2825 (1559 cidr, 1266 classful)
Largest number of cidr routes: 478 announced by AS701
Largest number of classful routes: 839 announced by AS701
1) Gains by aggregating at the origin AS level
--- 06Aug99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 346 150 196 56.6% BCnet Backbone
AS2609 124 20 104 83.9% EUnet-TN
AS1221 547 450 97 17.7% TELSTRA-AS
AS577 283 191 92 32.5% Bell Canada Backbone
AS174 574 482 92 16.0% Performance Systems International
AS3749 153 63 90 58.8% TECNET
AS7046 327 240 87 26.6% UUNET-CUSTOMER
AS4293 237 151 86 36.3% IMCI
AS4200 178 101 77 43.3% AGIS (Apex Global Information Ser
AS7545 141 66 75 53.2% TPG Internet Pty Ltd
AS7657 230 156 74 32.2% The Internet Group Limited
AS7496 107 34 73 68.2% Power Up
AS10928 117 48 69 59.0% UNKNOWN
AS9269 77 15 62 80.5% Hong Kong CTI
AS6944 63 6 57 90.5% RapidSite, Inc.
AS4755 133 77 56 42.1% Videsh Sanchar Nigam Ltd. India
AS719 457 406 51 11.2% LANLINK autonomous system
AS2493 157 108 49 31.2% iSTAR Internet, Inc.
AS684 91 46 45 49.5% Manitoba Regional Network Backbon
AS549 215 172 43 20.0% ONet Backbone
AS3737 108 67 41 38.0% PenTeleData Inc. (ASN-PTD)
AS209 263 226 37 14.1% Qwest Communications
AS1785 253 216 37 14.6% NYSERNet Backbone
AS1 503 468 35 7.0% BBNPLANET
AS10724 43 9 34 79.1% UNKNOWN
AS6762 33 2 31 93.9% Telecom Italia international high
AS4307 32 1 31 96.9% SVINET-1
AS8023 43 13 30 69.8% CASTLES
AS7745 38 8 30 78.9% BIGSKY-AS
AS6629 61 31 30 49.2% NOAA-AS
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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