The Cidr Report
Tony Bates
tbates at cisco.com
Fri Feb 20 20:00:01 UTC 1998
This is an auto-generated mail on Fri Feb 20 12:00:00 PST 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A summary of the last weeks changes in terms of withdrawn and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 20Feb98
0) General Status
Table History
-------------
Date Prefixes
050298 49484
140298 49400
150298 49226
160298 49509
170298 49589
180298 49307
190298 49418
200298 49181
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: 3244
Number of ASes announcing only one prefix: 1560 (801 cidr, 759 classful)
Largest number of cidr routes: 441 announced by AS3561
Largest number of classful routes: 1074 announced by AS701
1) Gains by aggregating at the origin AS level
--- 20Feb98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS2493 707 435 272 38.5% iSTAR Internet, Inc.
AS6235 525 261 264 50.3% Intermedia Communications, Inc.
AS4293 434 210 224 51.6% IMCI
AS816 585 420 165 28.2% UUNET Canada (ASN-UUNETCA-AS4)
AS3602 458 305 153 33.4% Sprint Canada Inc.
AS174 775 627 148 19.1% Performance Systems International
AS3749 198 55 143 72.2% TECNET
AS701 1074 950 124 11.5% Alternet
AS3751 125 48 77 61.6% SNET-AS
AS5668 109 37 72 66.1% Century Telephone Inc.
AS3804 204 142 62 30.4% WORLDLINX
AS1239 590 528 62 10.5% SprintLink Backbone
AS3221 92 32 60 65.2% EENet Autonomous System
AS271 112 56 56 50.0% BCNET-AS
AS3464 121 66 55 45.5% Alabama Research and Education Ne
AS72 84 36 48 57.1% Schlumberger Information Network
AS1221 263 215 48 18.3% AARNET-AS
AS549 205 158 47 22.9% ONET-AS
AS4755 78 34 44 56.4% Videsh Sanchar Nigam Ltd. India
AS2711 98 55 43 43.9% SUNBELT-AS
AS7046 131 89 42 32.1% UUNET-CUSTOMER
AS3561 883 842 41 4.6% MCI
AS852 157 117 40 25.5% CANET-ASN
AS684 86 46 40 46.5% MBNET-AS
AS6335 63 23 40 63.5% NTRNET
AS4740 348 308 40 11.5% ASN-OZEMAIL (Ozemail Pty Ltd)
AS1 789 749 40 5.1% BBNPLANET
AS6181 63 24 39 61.9% FUSE-NET
AS3493 166 128 38 22.9% INTERLINK
AS719 432 395 37 8.6% LANLINK autonomous system
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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