The Cidr Report
Tony Bates
tbates at cisco.com
Fri Sep 25 19:00:03 UTC 1998
This is an auto-generated mail on Fri Sep 25 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A summary of the last weeks changes in terms of withdrawn and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 25Sep98
0) General Status
Table History
-------------
Date Prefixes
180998 52123
190998 51991
200998 51978
210998 52066
220998 51837
230998 51717
240998 51971
250998 51953
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: 4041
Number of ASes announcing only one prefix: 1941 (1013 cidr, 928 classful)
Largest number of cidr routes: 341 announced by AS3561
Largest number of classful routes: 948 announced by AS701
1) Gains by aggregating at the origin AS level
--- 25Sep98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 349 151 198 56.7% BCnet Backbone
AS4293 418 245 173 41.4% IMCI
AS3749 232 72 160 69.0% TECNET
AS2493 362 206 156 43.1% iSTAR Internet, Inc.
AS701 948 817 131 13.8% Alternet
AS174 699 569 130 18.6% Performance Systems International
AS4200 188 96 92 48.9% AGIS (Apex Global Information Ser
AS5668 127 40 87 68.5% Century Telephone Inc.
AS4755 124 47 77 62.1% Videsh Sanchar Nigam Ltd. India
AS7046 246 170 76 30.9% UUNET-CUSTOMER
AS2685 224 148 76 33.9% IBM Global Network - US
AS3804 230 157 73 31.7% Bell Solutions
AS3221 118 45 73 61.9% EENet Autonomous System
AS4740 395 334 61 15.4% Ozemail Pty Ltd (ASN-OZEMAIL)
AS8517 124 72 52 41.9% ULAKNET-ASN
AS549 197 147 50 25.4% ONet Backbone
AS6335 69 20 49 71.0% NTRNET
AS72 87 39 48 55.2% Schlumberger Information Network
AS1239 541 494 47 8.7% SprintLink Backbone
AS803 77 33 44 57.1% SaskNet Backbone
AS7122 122 80 42 34.4% MTS ADVANCED Network Policy
AS7545 104 63 41 39.4% TPG Internet Pty Ltd
AS4539 68 28 40 58.8% NETROPOLIS
AS852 160 121 39 24.4% AGT Advance Communication
AS1221 310 271 39 12.6% AARNET-AS
AS6181 67 29 38 56.7% FUSE-NET
AS10459 46 9 37 80.4% WANSASN
AS10928 87 51 36 41.4% UNKNOWN
AS2707 64 31 33 51.6% WEC
AS1273 62 29 33 53.2% ECRC Network
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