The Cidr Report
Tony Bates
tbates at cisco.com
Fri Jun 12 19:00:04 UTC 1998
This is an auto-generated mail on Fri Jun 12 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A summary of the last weeks changes in terms of withdrawn and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 12Jun98
0) General Status
Table History
-------------
Date Prefixes
050698 50625
060698 51451
070698 51501
080698 51191
090698 51499
100698 51418
110698 51862
120698 51404
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: 3625
Number of ASes announcing only one prefix: 1735 (917 cidr, 818 classful)
Largest number of cidr routes: 357 announced by AS3561
Largest number of classful routes: 1128 announced by AS701
1) Gains by aggregating at the origin AS level
--- 12Jun98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS4293 463 240 223 48.2% IMCI
AS2493 501 291 210 41.9% iSTAR Internet, Inc.
AS3602 506 313 193 38.1% Sprint Canada Inc.
AS1740 545 353 192 35.2% CERFnet
AS701 1128 939 189 16.8% Alternet
AS3749 220 65 155 70.5% TECNET
AS174 728 583 145 19.9% Performance Systems International
AS4262 213 125 88 41.3% CERFnet Los Angeles SMDS
AS3221 112 42 70 62.5% EENet Autonomous System
AS4755 98 31 67 68.4% Videsh Sanchar Nigam Ltd. India
AS10928 109 43 66 60.6% UNKNOWN
AS7046 207 142 65 31.4% UUNET-CUSTOMER
AS5668 114 49 65 57.0% Century Telephone Inc.
AS3804 206 144 62 30.1% Bell Solutions
AS271 113 54 59 52.2% BCnet Backbone
AS1221 289 233 56 19.4% AARNET-AS
AS549 205 152 53 25.9% ONet Backbone
AS4740 375 323 52 13.9% ASN-OZEMAIL (Ozemail Pty Ltd)
AS4539 74 24 50 67.6% NETROPOLIS
AS72 85 37 48 56.5% Schlumberger Information Network
AS6335 68 20 48 70.6% NTRNET
AS8517 122 75 47 38.5% ULAKNET-ASN
AS4200 148 101 47 31.8% AGIS (Apex Global Information Ser
AS1239 541 494 47 8.7% SprintLink Backbone
AS852 159 118 41 25.8% AGT Advance Communication
AS7657 122 84 38 31.1% The Internet Group Limited
AS762 115 78 37 32.2% WELLFLEET-AS
AS719 443 406 37 8.4% LANLINK autonomous system
AS6181 65 28 37 56.9% FUSE-NET
AS803 72 36 36 50.0% SaskNet 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
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