Fw: How to configure another loopback device?

[John Dison]

jd> > Does adding ifconfig_lo0="inet 127.0.0.1/8" to /etc/rc.conf work?

jd>
jd> Yes, adding ifconfig_lo0="inet 127.0.0.1/8" helps indeed.
jd>
jd> Interesting is that if I also add ifconfig_lo0_ipv6="inet6 ::1/128"
jd> then ::1/128 will be on lo1.  If I do not add that line, it will be on lo0.
jd>
jd> Looks weird but that workaround work.  Thanks.

> Here are the reasons:
>
> - 127.0.0.1/8 will be configured on lo0 in rc.d scripts if
>    ifconfig_lo0 is missing after processing ifconfig_IF and before
>    doing ifconfig_IF_alias*.
>
> - You cannot manually configure ::1/128 because it is configured by
>   the kernel when a loopback interface becomes "up".  If you have an
>    ifconfig_lo1 and no ifconfig_lo0, ifconfig_lo1 will be processed
>   and make lo1 "up" first.


Okay, I see.  Thanks for the explanation.
Also one more thing which looks strange: if I use 
ifconfig_lo1_ipv6="inet6 auto_linklocal", then ipv6 aliases on lo1 are configured correctly, but there is no link-local address.  If I exclude this line from rc.conf, then no ipv6 aliases are configured at all (only ipv4).