The Cidr Report
Tony Bates
tbates at cisco.com
Fri Aug 21 19:00:05 UTC 1998
This is an auto-generated mail on Fri Aug 21 12:00:02 PDT 1998
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A summary of the last weeks changes in terms of withdrawn and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 21Aug98
0) General Status
Table History
-------------
Date Prefixes
130898 52878
150898 52681
160898 52695
170898 52882
180898 54822
190898 52846
200898 52926
210898 52842
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: 3903
Number of ASes announcing only one prefix: 1880 (974 cidr, 906 classful)
Largest number of cidr routes: 351 announced by AS3561
Largest number of classful routes: 1189 announced by AS701
1) Gains by aggregating at the origin AS level
--- 21Aug98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS701 1189 955 234 19.7% Alternet
AS3602 552 321 231 41.8% Sprint Canada Inc.
AS271 337 146 191 56.7% BCnet Backbone
AS4293 435 248 187 43.0% IMCI
AS2493 387 229 158 40.8% iSTAR Internet, Inc.
AS3749 224 67 157 70.1% TECNET
AS174 717 583 134 18.7% Performance Systems International
AS4200 195 100 95 48.7% AGIS (Apex Global Information Ser
AS5668 130 44 86 66.2% Century Telephone Inc.
AS2685 240 157 83 34.6% IBM Global Network - US
AS4755 121 46 75 62.0% Videsh Sanchar Nigam Ltd. India
AS4740 408 337 71 17.4% Ozemail Pty Ltd (ASN-OZEMAIL)
AS3221 112 42 70 62.5% EENet Autonomous System
AS7046 228 164 64 28.1% UUNET-CUSTOMER
AS3804 214 156 58 27.1% Bell Solutions
AS549 199 145 54 27.1% ONet Backbone
AS3403 181 127 54 29.8% TIAC
AS8517 124 72 52 41.9% ULAKNET-ASN
AS10928 100 48 52 52.0% UNKNOWN
AS719 462 413 49 10.6% LANLINK autonomous system
AS6335 69 20 49 71.0% NTRNET
AS72 87 39 48 55.2% Schlumberger Information Network
AS1239 527 479 48 9.1% SprintLink Backbone
AS4539 71 24 47 66.2% NETROPOLIS
AS803 78 34 44 56.4% SaskNet Backbone
AS1785 301 258 43 14.3% NYSERNet Backbone
AS852 157 117 40 25.5% AGT Advance Communication
AS6181 66 26 40 60.6% FUSE-NET
AS7122 120 82 38 31.7% MTS ADVANCED Network Policy
AS226 108 72 36 33.3% USC/Information Sciences Institut
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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