Excerpts from netbsd: 21-May-97 Re: BOOTP support (change r.. Curt
Sampson@portal.ca (825*)

> >   An interface that is assigned IP address 0.0.0.0 receives all
> >   packets that the underlying h/w interface receives, i.e. those
> >   with the matching h/w address or the h/w broadcast address.
> 
> Unfortunately, this means that if you `ifconfig xx0 up' without
> supplying an address (for whatever reason, say because something's
> broken in an rc script somewhere) you're recieving all packets and,
> presumably, trying to deal with them.

Isn't this bad behaviour of "ifconfig" which should be changed?
If a user requests to change a flag, just a flag should be affected.

best regards
Matthias Drochner