Darren Reed <darrenr@reed.wattle.id.au> writes:
> In some email I received from Jens A Nilsson, sie wrote:
> > 
> > I don't understand "ifconfig lo0 127.0.0.1 netmask 0xffff0000"
> > changes the netmask correctly.
> 
> Why should changing the netmask require you to specify the IP# ?

My guess is, because there are multiple IPs per interface with
independent netmasks.

Perry