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The Cidr Report
This is an auto-generated mail on Fri Oct 19 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.
Check http://www.employees.org/~tbates/cidr-report.html for a daily
update of this report.
NEW: Check http://www.employees.org/~tbates/cidr-report-region.html for
the regional version of this report.
NEW: Check http://www.employees.org/~tbates/autnums.html for a complete
list of autonomous system number to name mappings as used by the CIDR-Report.
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A summary of the last weeks changes in terms of withdrawn and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 CIDR Report <cidr-report at cisco.com>.
------------------------------------------------------------------------------
CIDR REPORT for 19Oct01
0) General Status
Table History
-------------
Date Prefixes
121001 104773
131001 104893
141001 104864
151001 104979
161001 105115
171001 105004
181001 105147
191001 104997
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: 11802
Number of ASes announcing only one prefix: 7010 (3983 cidr, 3027 classful)
Largest number of cidr routes: 852 announced by AS701
Largest number of classful routes: 1392 announced by AS701
1) Gains by aggregating at the origin AS level
--- 19Oct01 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS1221 1231 944 287 23.3% Telstra Pty Ltd
AS4151 306 171 135 44.1% USDA
AS13999 136 9 127 93.4% Mega Cable S.A. de C.V.
AS16473 201 76 125 62.2% Bell South
AS577 304 184 120 39.5% Bell Advanced Communications Inc.
AS4293 373 266 107 28.7% Cable & Wireless USA
AS2048 216 116 100 46.3% State of Louisiana
AS271 161 74 87 54.0% University of British Columbia
AS11686 224 143 81 36.2% Education Networks of America
AS4755 201 124 77 38.3% Videsh Sanchar Nigam Ltd. Autonom
AS1239 488 414 74 15.2% Sprint
AS12302 106 35 71 67.0% MobiFon S.A.
AS4200 141 74 67 47.5% Apex Global Information Services,
AS19632 72 7 65 90.3% Metropolis Intercom S.A.
AS3464 160 96 64 40.0% Alabama SuperComputer Network
AS17557 131 69 62 47.3% Pakistan Telecom
AS16758 63 6 57 90.5% IKON Office Solutions
AS209 308 253 55 17.9% Qwest
AS306 60 6 54 90.0% National Guard Bureau
AS226 146 93 53 36.3% Los Nettos
AS400 136 85 51 37.5% Headquarters Standard Systems Cen
AS17561 111 60 51 45.9% Internet service provision to Wes
AS1913 155 106 49 31.6% Defense Logistics Agency
AS1 527 479 48 9.1% BBN Planet
AS10620 68 21 47 69.1% TVCABLE BOGOTA
AS4323 247 201 46 18.6% Time Warner Communications, Inc.
AS15290 248 202 46 18.5% AT&T Canada IES
AS376 120 75 45 37.5% Reseau Interordinateurs Scientiqu
AS16814 64 19 45 70.3% NSS, S.A.
AS5106 81 38 43 53.1% Ameritech Advanced Data Services,
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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