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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical The Cidr Report
This is an auto-generated mail on Fri Jan 15 12:00:00 PST 1999
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A summary of the last weeks changes in terms of withdrawn and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.
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CIDR REPORT for 15Jan99
0) General Status
Table History
-------------
Date Prefixes
080199 54976
090199 54679
100199 54744
110199 54918
120199 54860
130199 54884
140199 55099
150199 55155
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
AS Summary
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Number of ASes in routing system: 4408
Number of ASes announcing only one prefix: 2168 (1156 cidr, 1012 classful)
Largest number of cidr routes: 355 announced by AS3561
Largest number of classful routes: 1013 announced by AS701
1) Gains by aggregating at the origin AS level
--- 15Jan99 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS271 389 144 245 63.0% UNKNOWN
AS701 1013 860 153 15.1% UNKNOWN
AS2493 319 173 146 45.8% UNKNOWN
AS174 650 536 114 17.5% UNKNOWN
AS5668 129 35 94 72.9% UNKNOWN
AS3749 157 65 92 58.6% UNKNOWN
AS4200 178 91 87 48.9% UNKNOWN
AS1267 111 30 81 73.0% UNKNOWN
AS4755 147 74 73 49.7% UNKNOWN
AS4293 208 137 71 34.1% UNKNOWN
AS549 218 152 66 30.3% UNKNOWN
AS4740 388 326 62 16.0% UNKNOWN
AS8517 134 75 59 44.0% UNKNOWN
AS1221 395 336 59 14.9% UNKNOWN
AS7657 142 87 55 38.7% UNKNOWN
AS7545 111 58 53 47.7% UNKNOWN
AS72 89 37 52 58.4% UNKNOWN
AS3493 252 200 52 20.6% UNKNOWN
AS7046 238 187 51 21.4% UNKNOWN
AS1239 531 484 47 8.9% UNKNOWN
AS10928 96 49 47 49.0% UNKNOWN
AS7496 74 28 46 62.2% UNKNOWN
AS577 210 164 46 21.9% UNKNOWN
AS852 175 132 43 24.6% UNKNOWN
AS719 452 409 43 9.5% UNKNOWN
AS3221 84 42 42 50.0% UNKNOWN
AS803 71 35 36 50.7% UNKNOWN
AS6897 62 27 35 56.5% UNKNOWN
AS7122 109 75 34 31.2% UNKNOWN
AS2764 327 294 33 10.1% 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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