|
|
 |
Re: The Cidr Report
- Date: Sun, 11 Feb 2001 21:26:46 -0800
So after a while of not working properly, the cidr-report should now be
fixed. In fact it has been working but because it is taking almost a day to
generate the data mainly because
of all the whois lookups the report has been misleading in that it looked
like the info wasn't
there where in fact it was from the day before. A few things I want to
point out about the
report.
1) It is not as useful as it used to be (even when it is working ;-)). Why ?
Firstly, when I started the report (6 or 7 years ago) I made a simple
assumption that
when ISPs advertised classles (as opposed to traditional classful A,B or C)
routes there
was a need for it as they had to go out of their way to configure it so
essentially I
ignored these routes in the AS aggregation calculations. Today, this does
not hold true
anywhere as much as it used to.
Secondly, it always makes the assumption that you can aggregate at the
source AS level which for some providers is clearly not true for all routes.
I need to look at changing the above assumptions in future reports to
see what
this does to potential savings. I expect it could be quite high. Even
today with the
simple assumptions above it appears to be a gain of 11,000 routes for
just 54,000
classful routes advertised.
2) It seems folks don't use it as much as they can as I see very little
positive changes anymore.
However, having said this I would like to understand from folks (reply
directly) if you
think I should continue to generate this.
Note also that in interesting aggregates section (see web page) this is
also not as
interesting (as it uses the same assumption above) as it used to be.
However, it is
worth having a quick look for config errors and would encourage providers
to do this
periodically.
--Tony
At 08:37 PM 2/11/2001 -0800, Tony Bates wrote:
This is an auto-generated mail on Sun Feb 11 20:37:22 PST 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.
....
1) Gains by aggregating at the origin AS level
--- 11Feb01 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS1221 1623 1207 416 25.6% Telstra Pty Ltd
AS701 1642 1451 191 11.6% UUNET Technologies, Inc.
AS271 280 132 148 52.9% University of British Columbia
AS7545 196 71 125 63.8% ASNBLK-APNIC-AS-2-BLOCK
AS9269 162 46 116 71.6% ASNBLK-APNIC-AS-3-BLOCK
AS6429 221 108 113 51.1% RdC Internet
AS6595 163 62 101 62.0% DoD Education Activity Network As
AS8013 434 336 98 22.6% PSINet Ltd. Canada
AS13999 107 10 97 90.7% Mega Cable S.A. de C.V.
AS4293 374 281 93 24.9% Cable & Wireless USA
AS7496 104 23 81 77.9% ASNBLK-APNIC-AS-2-BLOCK
AS4151 250 169 81 32.4% USDA
AS705 312 234 78 25.0% UUNET Technologies, Inc.
AS4755 209 137 72 34.4% Videsh Sanchar Nigam Ltd. Autonom
AS1942 137 65 72 52.6% FR-CICG-GRENOBLE
AS7018 615 544 71 11.5% AT&T
AS7046 325 255 70 21.5% UUNET Technologies, Inc.
AS577 236 167 69 29.2% Bell Advanced Communications Inc.
AS174 499 431 68 13.6% PSINet Inc.
AS1727 162 94 68 42.0% Commander Naval Surface force US
AS9498 88 21 67 76.1% BHARTI BT INTERNET LTD.
AS724 219 152 67 30.6% DLA Systems Automation Center
AS5106 101 37 64 63.4% Ameritech Advanced Data Services,
AS3464 153 92 61 39.9% Alabama SuperComputer Network
AS7657 185 125 60 32.4% ASNBLK-APNIC-AS-2-BLOCK
AS226 155 95 60 38.7% Los Nettos
AS3749 115 57 58 50.4% Tennessee Board of Regents
AS16758 63 6 57 90.5% IKON Office Solutions
AS6413 67 11 56 83.6% Southern Online Systems, Inc.
AS376 131 75 56 42.7% Reseau Interordinateurs Scientiqu
|
|
|
|
