The Cidr Report
Tony Bates
tbates at cisco.com
Fri Apr 17 19:00:02 UTC 1998
This is an auto-generated mail on Fri Apr 17 12:00:00 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A summary of the last weeks changes in terms of withdrawn and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 17Apr98
0) General Status
Table History
-------------
Date Prefixes
100498 50729
110498 50709
120498 50690
130498 50676
140498 51036
150498 51181
160498 50874
170498 51188
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: 3462
Number of ASes announcing only one prefix: 1628 (850 cidr, 778 classful)
Largest number of cidr routes: 378 announced by AS3561
Largest number of classful routes: 1088 announced by AS701
1) Gains by aggregating at the origin AS level
--- 17Apr98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS4293 438 216 222 50.7% IMCI
AS2493 560 344 216 38.6% iSTAR Internet, Inc.
AS816 666 454 212 31.8% UUNET Canada (ASN-UUNETCA-AS4)
AS3602 468 300 168 35.9% Sprint Canada Inc.
AS701 1088 924 164 15.1% Alternet
AS174 786 624 162 20.6% Performance Systems International
AS3749 216 71 145 67.1% TECNET
AS8505 155 34 121 78.1% Middle East Technical University
AS7046 234 134 100 42.7% UUNET-CUSTOMER
AS5668 118 44 74 62.7% Century Telephone Inc.
AS2048 162 90 72 44.4% LaNet
AS11003 129 57 72 55.8% UNKNOWN
AS3221 110 41 69 62.7% EENet Autonomous System
AS4755 91 28 63 69.2% Videsh Sanchar Nigam Ltd. India
AS271 111 52 59 53.2% BCnet Backbone
AS3804 200 142 58 29.0% Bell Solutions
AS10928 100 42 58 58.0% UNKNOWN
AS549 209 158 51 24.4% ONet Backbone
AS1239 541 491 50 9.2% SprintLink Backbone
AS72 84 36 48 57.1% Schlumberger Information Network
AS6392 79 32 47 59.5% MidWest Communications, Inc.
AS4763 123 76 47 38.2% Telstra New Zealand
AS1221 286 239 47 16.4% AARNET-AS
AS4740 356 313 43 12.1% ASN-OZEMAIL (Ozemail Pty Ltd)
AS1982 162 119 43 26.5% Northwest Nexus, Inc.
AS852 157 117 40 25.5% AGT Advance Communication
AS684 94 54 40 42.6% Manitoba Regional Network Backbon
AS4200 132 94 38 28.8% AGIS (Apex Global Information Ser
AS3493 164 126 38 23.2% INTERLINK
AS6335 63 27 36 57.1% NTRNET
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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