Top-50 Report

Paul A Vixie <> writes:
  * > Remember, this just looks at the classful routes and tries to cidrize
  * > them at the origin AS level. It assumes no holes either so it's quite
  * > possible to get a lot more back. Yes there are 31K classful routes. That'
  * s
  * > either a lot of legacy or not a lot of aggregation.
  * > --Tony
  * Given that the routing table stood at 28000 when CIDRD was killed off, I'd
  * say that there have either been some recent classful allocations, or a lot
  * of ancient networks suddenly getting advertised.

Or a lot less care and letting classful size announcments leak out and
not aggregating to the allocation folks were given. To highlight I pick
the last 50 classful entries I see in the 193, 198 and 206 range just
to give a random sample and to illustrate.

  this is what i was getting at in my note a week ago or so. it
appears that many more networks are being announced by 2+ as's. so
i'm assuming we're sort of doomed to poor aggregation as more and
more people dual-home to providers.

  and i still see some pretty poor aggregation (like /22's and /24's)
in some recent allocations.