The Cidr Report
Tony Bates
tbates at cisco.com
Fri Apr 23 19:00:02 UTC 1999
This is an auto-generated mail on Fri Apr 23 12:00:00 PDT 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A summary of the last weeks changes in terms of withdrawn and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 23Apr99
0) General Status
Table History
-------------
Date Prefixes
160499 58374
170499 58360
180499 58291
190499 58530
200499 58544
210499 58520
220499 58449
230499 58766
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 71.0.2.0/24 from AS1239
*** Bogus 221.43.160.0/19 from AS12323
AS Summary
----------
Number of ASes in routing system: 4930
Number of ASes announcing only one prefix: 2503 (1317 cidr, 1186 classful)
Largest number of cidr routes: 375 announced by AS701
Largest number of classful routes: 801 announced by AS701
1) Gains by aggregating at the origin AS level
--- 23Apr99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 360 148 212 58.9% BCnet Backbone
AS577 291 181 110 37.8% Bell Canada Backbone
AS4293 291 184 107 36.8% IMCI
AS174 615 509 106 17.2% Performance Systems International
AS4755 167 78 89 53.3% Videsh Sanchar Nigam Ltd. India
AS2493 216 129 87 40.3% iSTAR Internet, Inc.
AS3749 143 63 80 55.9% TECNET
AS4200 175 100 75 42.9% AGIS (Apex Global Information Ser
AS721 141 68 73 51.8% DLA-ASNBLOCK-AS
AS1267 94 24 70 74.5% IUNET-AS
AS7657 191 124 67 35.1% The Internet Group Limited
AS7496 97 31 66 68.0% Power Up
AS7545 110 46 64 58.2% TPG Internet Pty Ltd
AS7046 261 198 63 24.1% UUNET-CUSTOMER
AS1785 385 322 63 16.4% NYSERNet Backbone
AS1221 449 387 62 13.8% AARNET-AS
AS1239 527 467 60 11.4% SprintLink Backbone
AS4740 331 274 57 17.2% Ozemail Pty Ltd (ASN-OZEMAIL)
AS10928 110 53 57 51.8% UNKNOWN
AS3493 238 184 54 22.7% INTERLINK
AS719 470 417 53 11.3% LANLINK autonomous system
AS72 92 40 52 56.5% Schlumberger Information Network
AS803 79 35 44 55.7% SaskNet Backbone
AS5674 80 36 44 55.0% PBI-NET-BLK
AS3737 110 70 40 36.4% PenTeleData Inc. (ASN-PTD)
AS1 508 473 35 6.9% BBNPLANET
AS7122 109 77 32 29.4% MTS ADVANCED Network Policy
AS9269 52 21 31 59.6% Hong Kong CTI
AS4307 32 1 31 96.9% SVINET-1
AS11515 32 1 31 96.9% UNKNOWN
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