The Cidr Report
Tony Bates
tbates at cisco.com
Fri Aug 28 19:00:04 UTC 1998
This is an auto-generated mail on Fri Aug 28 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A summary of the last weeks changes in terms of withdrawn and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 28Aug98
0) General Status
Table History
-------------
Date Prefixes
210898 52842
220898 52964
230898 52773
240898 53047
250898 53127
260898 53242
270898 53089
280898 53151
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: 3922
Number of ASes announcing only one prefix: 1901 (987 cidr, 914 classful)
Largest number of cidr routes: 346 announced by AS3561
Largest number of classful routes: 1175 announced by AS701
1) Gains by aggregating at the origin AS level
--- 28Aug98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS3602 552 320 232 42.0% Sprint Canada Inc.
AS701 1175 949 226 19.2% Alternet
AS271 351 153 198 56.4% BCnet Backbone
AS4293 444 258 186 41.9% IMCI
AS2493 384 227 157 40.9% iSTAR Internet, Inc.
AS3749 223 67 156 70.0% TECNET
AS174 701 576 125 17.8% Performance Systems International
AS4200 193 99 94 48.7% AGIS (Apex Global Information Ser
AS5668 131 42 89 67.9% Century Telephone Inc.
AS2685 242 161 81 33.5% IBM Global Network - US
AS4755 124 47 77 62.1% Videsh Sanchar Nigam Ltd. India
AS4740 421 346 75 17.8% Ozemail Pty Ltd (ASN-OZEMAIL)
AS3221 112 42 70 62.5% EENet Autonomous System
AS7046 234 168 66 28.2% UUNET-CUSTOMER
AS3493 242 176 66 27.3% INTERLINK
AS3804 215 157 58 27.0% Bell Solutions
AS3403 182 127 55 30.2% TIAC
AS10928 101 46 55 54.5% UNKNOWN
AS549 205 151 54 26.3% ONet Backbone
AS8517 124 72 52 41.9% ULAKNET-ASN
AS719 464 415 49 10.6% LANLINK autonomous system
AS6335 69 20 49 71.0% NTRNET
AS72 87 39 48 55.2% Schlumberger Information Network
AS1239 551 503 48 8.7% SprintLink Backbone
AS803 78 34 44 56.4% SaskNet Backbone
AS4539 68 27 41 60.3% NETROPOLIS
AS852 158 118 40 25.3% AGT Advance Communication
AS6181 66 26 40 60.6% FUSE-NET
AS7122 119 80 39 32.8% MTS ADVANCED Network Policy
AS4614 68 32 36 52.9% Asiaonline Hong Kong
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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