The Cidr Report
Tony Bates
tbates at cisco.com
Fri Jul 31 19:00:02 UTC 1998
This is an auto-generated mail on Fri Jul 31 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A summary of the last weeks changes in terms of withdrawn and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 31Jul98
0) General Status
Table History
-------------
Date Prefixes
240798 52857
250798 52796
260798 52635
270798 53086
280798 53322
290798 52992
300798 52883
310798 52941
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 218.218.180.0 from AS701
AS Summary
----------
Number of ASes in routing system: 3786
Number of ASes announcing only one prefix: 1835 (963 cidr, 872 classful)
Largest number of cidr routes: 348 announced by AS3561
Largest number of classful routes: 1134 announced by AS701
1) Gains by aggregating at the origin AS level
--- 31Jul98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS3602 534 316 218 40.8% Sprint Canada Inc.
AS701 1134 933 201 17.7% Alternet
AS271 338 144 194 57.4% BCnet Backbone
AS4293 454 265 189 41.6% IMCI
AS2493 420 244 176 41.9% iSTAR Internet, Inc.
AS3749 222 69 153 68.9% TECNET
AS174 711 581 130 18.3% Performance Systems International
AS2685 249 157 92 36.9% IBM Global Network - US
AS5668 126 48 78 61.9% Century Telephone Inc.
AS3221 112 42 70 62.5% EENet Autonomous System
AS4755 118 50 68 57.6% Videsh Sanchar Nigam Ltd. India
AS3804 220 155 65 29.5% Bell Solutions
AS7046 223 165 58 26.0% UUNET-CUSTOMER
AS4740 397 339 58 14.6% ASN-OZEMAIL (Ozemail Pty Ltd)
AS549 207 152 55 26.6% ONet Backbone
AS10928 101 46 55 54.5% UNKNOWN
AS3403 180 126 54 30.0% TIAC
AS6335 68 19 49 72.1% NTRNET
AS72 85 37 48 56.5% Schlumberger Information Network
AS719 455 408 47 10.3% LANLINK autonomous system
AS1239 537 490 47 8.8% SprintLink Backbone
AS4539 71 26 45 63.4% NETROPOLIS
AS4200 142 97 45 31.7% AGIS (Apex Global Information Ser
AS237 95 50 45 47.4% MichNet Primary AS
AS1785 294 253 41 13.9% NYSERNet Backbone
AS852 155 115 40 25.8% AGT Advance Communication
AS6181 66 26 40 60.6% FUSE-NET
AS7122 120 82 38 31.7% MTS ADVANCED Network Policy
AS10921 57 19 38 66.7% KIHNETWORK
AS762 117 80 37 31.6% WELLFLEET-AS
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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