The Cidr Report

This is an auto-generated mail on Fri Mar 16 23:00:00 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

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      A summary of the last weeks changes in terms of withdrawn and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 for giving me access to their routing tables once a

Please send any comments about this report directly to me.

Check for a daily
update of this report.


Quote from "The Cidr Report":
} ASnum NetsNow NetsCIDR NetGain % Gain Description
} AS1221 1594 1194 400 25.1% Telstra Pty Ltd
} AS226 149 93 56 37.6% Los Nettos

Seeing the same few big providers in the report each week is
of course disheartening, but seeing these two stay on the list
is in my opinion even worse through disillusionment.

Telstra because they themselves give the impression of caring
about the global routing table size by maintaining the graph
of its growth over the years.

And Los Nettos / ISI because they give the impression of being
a sort of authority on networking know-how by associating
themselves with several related services and projects.

My email on Feb 1 to,,, has gone unanswered. Even a reply of "we don't care or we have our reasons" would have been better than no answer at all.