The Cidr Report
Tony Bates
tbates at cisco.com
Fri Aug 7 19:00:02 UTC 1998
This is an auto-generated mail on Fri Aug 7 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A summary of the last weeks changes in terms of withdrawn and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 07Aug98
0) General Status
Table History
-------------
Date Prefixes
310798 52941
010898 52807
020898 52843
030898 52915
040898 52856
050898 52828
060898 52871
070898 52903
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: 3804
Number of ASes announcing only one prefix: 1844 (971 cidr, 873 classful)
Largest number of cidr routes: 343 announced by AS3561
Largest number of classful routes: 1137 announced by AS701
1) Gains by aggregating at the origin AS level
--- 07Aug98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS3602 551 320 231 41.9% Sprint Canada Inc.
AS701 1137 934 203 17.9% Alternet
AS271 333 143 190 57.1% BCnet Backbone
AS4293 438 254 184 42.0% IMCI
AS2493 406 240 166 40.9% iSTAR Internet, Inc.
AS3749 222 69 153 68.9% TECNET
AS174 719 587 132 18.4% Performance Systems International
AS4200 192 100 92 47.9% AGIS (Apex Global Information Ser
AS2685 243 157 86 35.4% IBM Global Network - US
AS5668 129 47 82 63.6% Century Telephone Inc.
AS4755 121 45 76 62.8% Videsh Sanchar Nigam Ltd. India
AS3221 112 42 70 62.5% EENet Autonomous System
AS7046 226 160 66 29.2% UNKNOWN
AS3804 220 155 65 29.5% Bell Solutions
AS4740 403 342 61 15.1% ASN-OZEMAIL (Ozemail Pty Ltd)
AS10928 101 46 55 54.5% UNKNOWN
AS3403 181 127 54 29.8% TIAC
AS549 204 153 51 25.0% ONet Backbone
AS8517 122 72 50 41.0% ULAKNET-ASN
AS6335 68 19 49 72.1% NTRNET
AS72 85 37 48 56.5% Schlumberger Information Network
AS719 459 412 47 10.2% LANLINK autonomous system
AS1239 532 485 47 8.8% SprintLink Backbone
AS4539 70 27 43 61.4% NETROPOLIS
AS1785 298 255 43 14.4% NYSERNet Backbone
AS852 156 116 40 25.6% AGT Advance Communication
AS6181 66 26 40 60.6% FUSE-NET
AS10921 57 19 38 66.7% KIHNETWORK
AS762 117 80 37 31.6% WELLFLEET-AS
AS10459 47 10 37 78.7% WANSASN
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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