The Cidr Report
Tony Bates
tbates at cisco.com
Fri Dec 11 20:00:04 UTC 1998
This is an auto-generated mail on Fri Dec 11 12:00:00 PST 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A summary of the last weeks changes in terms of withdrawn and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 11Dec98
0) General Status
Table History
-------------
Date Prefixes
041298 56909
051298 54481
061298 54434
071298 54459
081298 54420
091298 54487
101298 54540
111298 54438
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: 4309
Number of ASes announcing only one prefix: 2109 (1119 cidr, 990 classful)
Largest number of cidr routes: 357 announced by AS3561
Largest number of classful routes: 981 announced by AS701
1) Gains by aggregating at the origin AS level
--- 11Dec98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 349 152 197 56.4% BCnet Backbone
AS3749 230 70 160 69.6% TECNET
AS2493 331 184 147 44.4% iSTAR Internet, Inc.
AS1785 542 402 140 25.8% NYSERNet Backbone
AS701 981 845 136 13.9% Alternet
AS174 678 548 130 19.2% Performance Systems International
AS4200 188 96 92 48.9% AGIS (Apex Global Information Ser
AS5668 125 39 86 68.8% Century Telephone Inc.
AS1267 109 30 79 72.5% IUNET-AS
AS4293 205 133 72 35.1% IMCI
AS4755 136 65 71 52.2% Videsh Sanchar Nigam Ltd. India
AS549 220 154 66 30.0% ONet Backbone
AS4740 387 326 61 15.8% Ozemail Pty Ltd (ASN-OZEMAIL)
AS1221 396 338 58 14.6% AARNET-AS
AS8517 127 71 56 44.1% UNKNOWN
AS7046 249 196 53 21.3% UUNET-CUSTOMER
AS7545 116 66 50 43.1% TPG Internet Pty Ltd
AS7657 136 88 48 35.3% The Internet Group Limited
AS72 88 40 48 54.5% Schlumberger Information Network
AS1239 524 477 47 9.0% SprintLink Backbone
AS7496 75 30 45 60.0% Power Up
AS577 209 164 45 21.5% CA*net Networking Inc Backbone
AS3221 84 42 42 50.0% RIPE-ASNBLOCK4
AS852 172 131 41 23.8% AGT Advance Communication
AS10928 88 47 41 46.6% UNKNOWN
AS719 438 401 37 8.4% LANLINK-AS
AS803 71 35 36 50.7% SaskNet Backbone
AS3564 69 36 33 47.8% Microserve Infromation Systems In
AS2707 65 32 33 50.8% WEC
AS7122 107 75 32 29.9% MTS ADVANCED Network Policy
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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