here's as far we have got.

  > farrache at ccpnxt5.in2p3.fr (Gilles Farrache) writes:
  > Daniel,
  > 
  > This route is announced via the aggregated route without the assent
  > of the AS realy originating the route ? Is the main difference with
  > hole that the route is reachable but "not recommended" ?

It means: There used to be a more specific route which is now withdrawn
and part of an inhomogeneous aggregate.

Example: University X has a Physics Dept. with a route in community HEPNET.
University X now aggregates all its routes including the HEPNET one 
for efficiency. The University now has the option to keep the HEPNET
route in the registry with the "withdrawn" attribute so that anyone
whose routing policy depends on HEPNET can see that this happened and
consider asking them to announce the more specific, or can do things
locally if required.

Clear?

Daniel



-------- Logged at  Tue Jun 7 09:37:34 MET DST 1994  ---------