The Cidr Report
Tony Bates
tbates at cisco.com
Fri Sep 4 19:00:03 UTC 1998
This is an auto-generated mail on Fri Sep 4 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A summary of the last weeks changes in terms of withdrawn and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 04Sep98
0) General Status
Table History
-------------
Date Prefixes
280898 53151
290898 53143
300898 53149
310898 53251
010998 53157
020998 53162
030998 53176
040998 52828
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: 3962
Number of ASes announcing only one prefix: 1903 (997 cidr, 906 classful)
Largest number of cidr routes: 350 announced by AS701
Largest number of classful routes: 1174 announced by AS701
1) Gains by aggregating at the origin AS level
--- 04Sep98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS701 1174 950 224 19.1% Alternet
AS271 349 152 197 56.4% BCnet Backbone
AS4293 445 260 185 41.6% IMCI
AS3749 224 67 157 70.1% TECNET
AS2493 374 219 155 41.4% iSTAR Internet, Inc.
AS174 696 569 127 18.2% Performance Systems International
AS4200 192 98 94 49.0% AGIS (Apex Global Information Ser
AS5668 133 42 91 68.4% Century Telephone Inc.
AS2685 234 154 80 34.2% IBM Global Network - US
AS4755 124 47 77 62.1% Videsh Sanchar Nigam Ltd. India
AS4740 419 344 75 17.9% Ozemail Pty Ltd (ASN-OZEMAIL)
AS3221 116 45 71 61.2% EENet Autonomous System
AS7046 236 171 65 27.5% UUNET-CUSTOMER
AS3493 220 156 64 29.1% INTERLINK
AS3804 215 157 58 27.0% Bell Solutions
AS3403 182 127 55 30.2% TIAC
AS549 203 150 53 26.1% ONet Backbone
AS8517 123 71 52 42.3% ULAKNET-ASN
AS10928 100 48 52 52.0% UNKNOWN
AS719 469 418 51 10.9% LANLINK autonomous system
AS6335 69 20 49 71.0% NTRNET
AS72 87 39 48 55.2% Schlumberger Information Network
AS1239 552 504 48 8.7% SprintLink Backbone
AS803 78 34 44 56.4% SaskNet Backbone
AS6181 66 26 40 60.6% FUSE-NET
AS4539 67 27 40 59.7% NETROPOLIS
AS852 158 119 39 24.7% AGT Advance Communication
AS7122 119 80 39 32.8% MTS ADVANCED Network Policy
AS10459 45 10 35 77.8% WANSASN
AS4763 100 66 34 34.0% Telstra New Zealand
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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