> sorry :) I am refering to clustering as in a distributed system, like the 
> beowulf's under linux.

Beowulf is essentially just a bunch of Linux boxes running PVM using a
fancy routing table to get whatever network topology you want (i.e.
hypercube or the "chorded ring" which Donald Becker used).  If I am not
mistaken there are a few hacks to the ethernet drivers to allow the
"trunking" of interfaces.


Carl