The Cidr Report
Tony Bates
tbates at cisco.com
Fri Jan 23 20:00:02 UTC 1998
This is an auto-generated mail on Fri Jan 23 12:00:00 PST 1998
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A summary of the last weeks changes in terms of withdrawn and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 23Jan98
0) General Status
Table History
-------------
Date Prefixes
160198 48136
170198 47944
180198 47971
190198 48017
200198 48183
210198 48498
220198 48637
230198 48658
Check http://www.employees.org/~tbates/cidr.plot.html for a plot
of the table history.
Possible Bogus Routes
---------------------
*** Bogus 212.192.0.0/16 from AS5568
*** Bogus 212.255.0.0/16 from AS2871
AS Summary
----------
Number of ASes in routing system: 3149
Number of ASes announcing only one prefix: 1462 (756 cidr, 706 classful)
Largest number of cidr routes: 450 announced by AS3561
Largest number of classful routes: 1005 announced by AS701
1) Gains by aggregating at the origin AS level
--- 23Jan98 ---
ASnum NetsNow NetsCIDR NetGain % Gain Description
AS2493 705 396 309 43.8% iSTAR Internet, Inc.
AS6235 489 254 235 48.1% Intermedia Communications, Inc.
AS4293 425 211 214 50.4% IMCI
AS174 875 671 204 23.3% Performance Systems International
AS816 581 404 177 30.5% UUNET Canada (ASN-UUNETCA-AS4)
AS3602 453 301 152 33.6% Sprint Canada Inc.
AS3749 201 60 141 70.1% TECNET
AS701 1005 896 109 10.8% Alternet
AS3751 123 47 76 61.8% SNET-AS
AS2048 161 91 70 43.5% LaNet
AS5668 106 40 66 62.3% Century Telephone Inc.
AS3804 203 141 62 30.5% Bell Solutions
AS1 846 787 59 7.0% BBNPLANET
AS549 216 159 57 26.4% ONet Backbone
AS271 111 56 55 49.5% BCnet Backbone
AS3464 116 63 53 45.7% Alabama Research and Education Ne
AS1239 578 526 52 9.0% SprintLink Backbone
AS7545 114 66 48 42.1% TPG Internet Pty Ltd
AS72 84 36 48 57.1% Schlumberger Information Network
AS4763 127 79 48 37.8% Telstra New Zealand
AS719 507 461 46 9.1% LANLINK autonomous system
AS684 84 39 45 53.6% Manitoba Regional Network Backbon
AS1221 257 212 45 17.5% AARNET-AS
AS2711 97 55 42 43.3% SUNBELT-AS
AS3561 922 881 41 4.4% MCI
AS6335 62 24 38 61.3% NTRNET
AS4740 333 295 38 11.4% ASN-OZEMAIL (Ozemail Pty Ltd)
AS4682 62 24 38 61.3% ITJ Intelligent Telecom Inc.,
AS1691 161 123 38 23.6% BCTEL
AS6332 83 46 37 44.6% TELNOR
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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