[36986] in North American Network Operators' Group
The Cidr Report
daemon@ATHENA.MIT.EDU (Tony Bates)
Sat Apr 28 02:08:49 2001
Message-Id: <200104280600.XAA21668@lovefm.cisco.com>
To: nanog@merit.edu
Cc: tbates@cisco.com, eof-list@ripe.net, apops@apnic.net,
routing-wg@ripe.net
Date: Fri, 27 Apr 2001 23:00:02 -0700
From: Tony Bates <tbates@cisco.com>
Errors-To: owner-nanog-outgoing@merit.edu
This is an auto-generated mail on Fri Apr 27 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A summary of the last weeks changes in terms of withdrawn and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 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 27Apr01
0) General Status
Table History
-------------
Date Prefixes
200401 100216
210401 100108
220401 100099
230401 100219
240401 100457
250401 100635
260401 100755
270401 100797
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 218.6.128.0/17 from AS4134
AS Summary
----------
Number of ASes in routing system: 10591
Number of ASes announcing only one prefix: 6292 (3570 cidr, 2722 classful)
Largest number of cidr routes: 1365 announced by AS705
Largest number of classful routes: 1602 announced by AS1221
1) Gains by aggregating at the origin AS level
--- 27Apr01 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS1221 1602 1190 412 25.7% TELSTRA-AS
AS701 1409 1222 187 13.3% Alternet
AS705 393 258 135 34.4% part of AS assignment AS701 - AS7
AS4151 257 145 112 43.6% part of AS assignment AS4151 - AS
AS6429 216 105 111 51.4% ATT LA Internet Chile
AS6595 163 62 101 62.0% autonomous system number assigned
AS13999 104 8 96 92.3% autonomous system number assigned
AS4293 372 279 93 25.0% part of AS assignment AS4287 - AS
AS8013 326 239 87 26.7% autonomous system number assigned
AS7018 698 613 85 12.2% AT&T WorldNet Service Backbone
AS4755 229 144 85 37.1% part of AS assignment AS4608 - AS
AS15412 260 183 77 29.6% FLAG Telecom Global Internet AS
AS577 238 169 69 29.0% autonomous system number assigned
AS6471 113 49 64 56.6% autonomous system number assigned
AS5106 101 37 64 63.4% autonomous system number assigned
AS3464 153 91 62 40.5% Alabama Research and Education Ne
AS3749 120 59 61 50.8% autonomous system number assigned
AS724 202 144 58 28.7% part of AS assignment AS721 - AS7
AS3602 253 195 58 22.9% Sprint Canada Inc.
AS11252 92 34 58 63.0% autonomous system number assigned
AS16758 63 6 57 90.5% autonomous system number assigned
AS1 608 551 57 9.4% GTE Internetworking
AS6413 67 11 56 83.6% autonomous system number assigned
AS226 149 93 56 37.6% Los Nettos
AS4323 232 179 53 22.8% Time Warner Telecom Internet
AS852 203 155 48 23.6% autonomous system number assigned
AS9269 109 62 47 43.1% Hong Kong CTI
AS855 145 99 46 31.7% part of AS assignment AS853 - AS1
AS13544 68 22 46 67.6% autonomous system number assigned
AS12235 49 3 46 93.9% Cove Software Systems Inc
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
