"Perry E. Metzger" <perry@piermont.com>  wrote:
 > 
 > Herb Peyerl <hpeyerl@beer.org> writes:
 > > Under NetBSD:
 > > 
 > >    ifconfig foo0 alias 206.171.30.4 netmask 255.255.255.0
 > > 
 > > or in /etc/ifconfig.foo0:
 > > 
 > >    inet 206.171.30.4 netmask 255.255.255.0 alias
 > 
 > There's also the ifaliases file.

yes, but the comment in /etc/rc.d/network says:

	# Note that $ifaliases_xxN works only with certain configurations and
	# considered not recommended.  Use /etc/ifconfig.xxN if possible.

as I discovered when I was composing the above reply.