The Cidr Report
Tony Bates
tbates at cisco.com
Fri Jul 17 19:00:02 UTC 1998
This is an auto-generated mail on Fri Jul 17 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A summary of the last weeks changes in terms of withdrawn and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 17Jul98
0) General Status
Table History
-------------
Date Prefixes
100798 52359
110798 52365
120798 52291
130798 52391
140798 52359
150798 52389
160798 52656
170798 52681
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 213.102.1.0 from AS3259
*** Bogus 214.0.0.0/8 from AS568
*** Bogus 215.0.0.0/9 from AS568
*** Bogus 216.0.0.0/14 from AS2548
*** Bogus 216.13.0.0/19 from AS6401
*** Bogus 216.13.32.0/19 from AS6401
*** Bogus 216.15.0.0/19 from AS10368
*** Bogus 216.15.128.0/19 from AS7393
*** Bogus 216.16.0.0/19 from AS6304
*** Bogus 216.18.0.0/19 from AS6539
*** Bogus 216.19.0.0/18 from AS4492
*** Bogus 216.22.0.0/19 from AS7960
*** Bogus 216.23.0.0/19 from AS8079
*** Bogus 216.27.0.0 from AS7349
*** Bogus 216.214.0.0/18 from AS7194
AS Summary
----------
Number of ASes in routing system: 3750
Number of ASes announcing only one prefix: 1827 (964 cidr, 863 classful)
Largest number of cidr routes: 360 announced by AS3561
Largest number of classful routes: 1143 announced by AS701
1) Gains by aggregating at the origin AS level
--- 17Jul98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS2493 485 278 207 42.7% iSTAR Internet, Inc.
AS3602 516 311 205 39.7% Sprint Canada Inc.
AS701 1143 941 202 17.7% Alternet
AS271 340 144 196 57.6% BCnet Backbone
AS4293 450 257 193 42.9% IMCI
AS3749 223 66 157 70.4% TECNET
AS174 731 589 142 19.4% Performance Systems International
AS2685 266 161 105 39.5% IBM Global Network - US
AS5668 135 49 86 63.7% Century Telephone Inc.
AS2764 428 347 81 18.9% connect.com.au pty ltd
AS4755 117 41 76 65.0% Videsh Sanchar Nigam Ltd. India
AS3221 112 42 70 62.5% EENet Autonomous System
AS3804 220 155 65 29.5% Bell Solutions
AS7046 228 165 63 27.6% UUNET-CUSTOMER
AS4740 401 344 57 14.2% ASN-OZEMAIL (Ozemail Pty Ltd)
AS10928 102 45 57 55.9% UNKNOWN
AS3403 179 127 52 29.1% TIAC
AS8517 123 72 51 41.5% ULAKNET-ASN
AS6335 68 19 49 72.1% NTRNET
AS72 85 37 48 56.5% Schlumberger Information Network
AS1239 540 493 47 8.7% SprintLink Backbone
AS719 450 404 46 10.2% LANLINK autonomous system
AS4539 71 26 45 63.4% NETROPOLIS
AS4200 142 97 45 31.7% AGIS (Apex Global Information Ser
AS852 157 116 41 26.1% AGT Advance Communication
AS762 118 80 38 32.2% WELLFLEET-AS
AS1785 287 249 38 13.2% NYSERNet Backbone
AS6392 66 29 37 56.1% MidWest Communications, Inc.
AS6181 65 28 37 56.9% FUSE-NET
AS549 174 137 37 21.3% ONet 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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