The Cidr Report
Tony Bates
tbates at cisco.com
Sat Jun 16 06:00:02 UTC 2001
This is an auto-generated mail on Fri Jun 15 23:00:00 PDT 2001
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A summary of the last weeks changes in terms of withdrawn and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 GX Networks 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 15Jun01
0) General Status
Table History
-------------
Date Prefixes
080601 102522
090601 102942
100601 102382
110601 102484
120601 102300
130601 102055
140601 101900
150601 101429
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: 6880
Number of ASes announcing only one prefix: 2796 (0 cidr, 2796 classful)
Largest number of cidr routes: 0 announced by
Largest number of classful routes: 1403 announced by AS701
1) Gains by aggregating at the origin AS level
--- 15Jun01 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS1221 1392 1032 360 25.9% UNKNOWN
AS701 1403 1217 186 13.3% UNKNOWN
AS4293 396 281 115 29.0% UNKNOWN
AS4151 252 137 115 45.6% UNKNOWN
AS4755 256 142 114 44.5% UNKNOWN
AS6429 207 102 105 50.7% UNKNOWN
AS6595 159 59 100 62.9% UNKNOWN
AS705 251 155 96 38.2% UNKNOWN
AS13999 103 11 92 89.3% UNKNOWN
AS8013 300 222 78 26.0% UNKNOWN
AS577 254 179 75 29.5% UNKNOWN
AS7018 700 628 72 10.3% UNKNOWN
AS724 223 159 64 28.7% UNKNOWN
AS6471 114 50 64 56.1% UNKNOWN
AS3464 152 90 62 40.8% UNKNOWN
AS1 597 538 59 9.9% UNKNOWN
AS16758 63 6 57 90.5% UNKNOWN
AS2149 333 277 56 16.8% UNKNOWN
AS1239 439 384 55 12.5% UNKNOWN
AS3908 207 154 53 25.6% UNKNOWN
AS226 143 90 53 37.1% UNKNOWN
AS6413 66 14 52 78.8% UNKNOWN
AS5106 95 43 52 54.7% UNKNOWN
AS17561 112 61 51 45.5% UNKNOWN
AS3602 229 179 50 21.8% UNKNOWN
AS13544 69 19 50 72.5% UNKNOWN
AS9842 54 5 49 90.7% UNKNOWN
AS852 209 160 49 23.4% UNKNOWN
AS855 144 98 46 31.9% UNKNOWN
AS3749 94 48 46 48.9% UNKNOWN
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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