IPv4 loopback address is missing, why?

[Glen Barber]

Andrew Falanga said: 
> HI,
> 
> On my father's computer there isn't an IPv4 loopback address being assigned to 
> the lo0 interface.  What would cause this?  I've looked at his configs and 
> they're the same as on my system (obviously something is different, but I 
> don't know what).  I see in his /etc/defaults/rc.conf the "ifconfig_lo0" line 
> is *NOT* commented out or otherwise altered and his file looks the same as 
> mine (at least on this point, I haven't contrasted the two entirely).
> 
> So, why would his system not be configuring an IPv4 loopback address?  After 
> bootup, I can add the address manually using ifconfig.
> 
Do you know if the machine was set up with IPv6 or IPv4 at install?
I've never used IPv6, but perhaps when that is chosen, `ifconfig'
doesn't show the IPv4 address for lo0.

Just a guess.

-- 
Glen Barber
http://www.dev-urandom.com/