IPv4 loopback address is missing, why?

Glen Barber glen.j.barber at gmail.com
Tue Mar 18 07:58:17 UTC 2008

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

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