The Cidr Report
Tony Bates
tbates at cisco.com
Fri Sep 18 19:00:04 UTC 1998
This is an auto-generated mail on Fri Sep 18 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A summary of the last weeks changes in terms of withdrawn and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 18Sep98
0) General Status
Table History
-------------
Date Prefixes
110998 53238
120998 51812
130998 51865
140998 51883
150998 52067
160998 52072
170998 51947
180998 52123
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: 4020
Number of ASes announcing only one prefix: 1940 (1002 cidr, 938 classful)
Largest number of cidr routes: 340 announced by AS3561
Largest number of classful routes: 1167 announced by AS701
1) Gains by aggregating at the origin AS level
--- 18Sep98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS701 1167 936 231 19.8% Alternet
AS271 345 149 196 56.8% BCnet Backbone
AS4293 442 255 187 42.3% IMCI
AS3749 226 68 158 69.9% TECNET
AS2493 367 212 155 42.2% iSTAR Internet, Inc.
AS174 701 570 131 18.7% Performance Systems International
AS4200 187 96 91 48.7% AGIS (Apex Global Information Ser
AS5668 128 41 87 68.0% Century Telephone Inc.
AS4755 124 46 78 62.9% Videsh Sanchar Nigam Ltd. India
AS2685 227 150 77 33.9% IBM Global Network - US
AS3804 231 158 73 31.6% Bell Solutions
AS3221 117 44 73 62.4% EENet Autonomous System
AS7046 246 175 71 28.9% UUNET-CUSTOMER
AS4740 385 331 54 14.0% Ozemail Pty Ltd (ASN-OZEMAIL)
AS549 203 150 53 26.1% ONet Backbone
AS8517 124 72 52 41.9% ULAKNET-ASN
AS10928 100 48 52 52.0% UNKNOWN
AS6335 69 20 49 71.0% NTRNET
AS72 87 39 48 55.2% Schlumberger Information Network
AS1239 542 495 47 8.7% SprintLink Backbone
AS803 78 34 44 56.4% SaskNet Backbone
AS4539 68 28 40 58.8% NETROPOLIS
AS852 160 121 39 24.4% AGT Advance Communication
AS7122 119 80 39 32.8% MTS ADVANCED Network Policy
AS6181 65 28 37 56.9% FUSE-NET
AS10459 45 10 35 77.8% WANSASN
AS2707 64 31 33 51.6% WEC
AS1221 281 249 32 11.4% AARNET-AS
AS6332 89 58 31 34.8% TELNOR
AS4307 32 1 31 96.9% SVINET-1
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