Quoting Mark Burgess,

> Does anyone know the proper syntax for creating virtual IP addresses on 
> NetBSD 1.0? I've tried "ifconfig ed0 199.2.50.2 199.2.50.249 alias" and 
> that just reset the broadcast address for the ed0 interface. .2 is the 
> server primary address and .249 is the virtual address I'm trying to create.

I never tried to configure an interface with an alias in one go, but assuming
that ed0 is already set to be bound to address 199.2.50.2, this should work:
'ifconfig ed0 alias 199.2.50.249'

- Frank