The Cidr Report
Tony Bates
tbates at cisco.com
Fri Feb 26 20:00:03 UTC 1999
This is an auto-generated mail on Fri Feb 26 12:00:00 PST 1999
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A summary of the last weeks changes in terms of withdrawn and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 26Feb99
0) General Status
Table History
-------------
Date Prefixes
190299 56528
200299 56373
210299 56116
220299 56354
230299 56456
240299 56506
250299 56299
260299 56598
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: 4611
Number of ASes announcing only one prefix: 2304 (1234 cidr, 1070 classful)
Largest number of cidr routes: 357 announced by AS701
Largest number of classful routes: 867 announced by AS701
1) Gains by aggregating at the origin AS level
--- 26Feb99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 355 144 211 59.4% BCnet Backbone
AS2493 270 153 117 43.3% iSTAR Internet, Inc.
AS174 641 529 112 17.5% Performance Systems International
AS11305 116 8 108 93.1% UNKNOWN
AS4755 158 78 80 50.6% Videsh Sanchar Nigam Ltd. India
AS1267 107 29 78 72.9% IUNET-AS
AS3749 140 63 77 55.0% TECNET
AS4293 218 144 74 33.9% IMCI
AS7545 112 48 64 57.1% TPG Internet Pty Ltd
AS4200 165 101 64 38.8% AGIS (Apex Global Information Ser
AS1221 423 360 63 14.9% AARNET-AS
AS4740 385 324 61 15.8% Ozemail Pty Ltd (ASN-OZEMAIL)
AS7046 258 200 58 22.5% UUNET-CUSTOMER
AS1239 529 471 58 11.0% SprintLink Backbone
AS72 89 37 52 58.4% Schlumberger Information Network
AS10928 102 50 52 51.0% UNKNOWN
AS577 222 172 50 22.5% Bell Canada Backbone
AS7657 142 93 49 34.5% The Internet Group Limited
AS7496 78 29 49 62.8% Power Up
AS719 460 414 46 10.0% LANLINK autonomous system
AS803 78 34 44 56.4% SaskNet Backbone
AS852 177 137 40 22.6% AGT Advance Communication
AS701 867 828 39 4.5% Alternet
AS5674 64 27 37 57.8% PBI-NET-BLK
AS7745 39 4 35 89.7% BIGSKY-AS
AS7122 112 77 35 31.2% MTS ADVANCED Network Policy
AS1785 249 217 32 12.9% NYSERNet Backbone
AS1 505 473 32 6.3% BBNPLANET
AS6332 94 63 31 33.0% TELNOR
AS549 163 132 31 19.0% ONet Backbone
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
More information about the NANOG
mailing list