The Cidr Report
Tony Bates
tbates at cisco.com
Fri Apr 10 19:00:02 UTC 1998
This is an auto-generated mail on Fri Apr 10 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A summary of the last weeks changes in terms of withdrawn and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 10Apr98
0) General Status
Table History
-------------
Date Prefixes
030498 50479
040498 50660
050498 50519
060498 50595
070498 50748
080498 50724
090498 50529
100498 50729
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: 3448
Number of ASes announcing only one prefix: 1614 (846 cidr, 768 classful)
Largest number of cidr routes: 412 announced by AS3561
Largest number of classful routes: 1036 announced by AS701
1) Gains by aggregating at the origin AS level
--- 10Apr98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS4293 437 213 224 51.3% IMCI
AS2493 553 338 215 38.9% iSTAR Internet, Inc.
AS816 672 461 211 31.4% UUNET Canada (ASN-UUNETCA-AS4)
AS3602 467 302 165 35.3% Sprint Canada Inc.
AS174 774 617 157 20.3% Performance Systems International
AS701 1036 881 155 15.0% Alternet
AS3749 218 63 155 71.1% TECNET
AS8505 154 34 120 77.9% Middle East Technical University
AS2939 186 77 109 58.6% SCAROLINA-AS
AS2048 162 90 72 44.4% LaNet
AS11003 126 56 70 55.6% UNKNOWN
AS5668 116 47 69 59.5% Century Telephone Inc.
AS3221 107 39 68 63.6% EENet Autonomous System
AS271 112 53 59 52.7% BCnet Backbone
AS3804 199 141 58 29.1% Bell Solutions
AS10928 99 41 58 58.6% UNKNOWN
AS549 209 159 50 23.9% ONet Backbone
AS1239 538 488 50 9.3% SprintLink Backbone
AS1221 272 223 49 18.0% AARNET-AS
AS72 84 36 48 57.1% Schlumberger Information Network
AS4755 85 37 48 56.5% Videsh Sanchar Nigam Ltd. India
AS6392 79 32 47 59.5% MidWest Communications, Inc.
AS7046 154 108 46 29.9% UUNET-CUSTOMER
AS4763 122 76 46 37.7% Telstra New Zealand
AS1982 161 118 43 26.7% Northwest Nexus, Inc.
AS4740 351 309 42 12.0% ASN-OZEMAIL (Ozemail Pty Ltd)
AS852 157 117 40 25.5% AGT Advance Communication
AS684 92 52 40 43.5% Manitoba Regional Network Backbon
AS4200 134 95 39 29.1% AGIS (Apex Global Information Ser
AS3493 164 126 38 23.2% INTERLINK
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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