How to configure another loopback device?

[Miroslav Lachman]

John Dison via freebsd-net wrote on 2016/12/23 15:10:
> Sorry, just noticed damn yahoo mailer eat all line breaks.  Resending in plain text (I hope):
>
> I want to configure lo1 loopback device and assign aliases to it via rc.conf system (at boot).
> I also want loopback addresses to remain on lo0.
>
> What I have:
> ipv6_activate_all_interfaces="YES"
> ifconfig_lo1_alias0="inet IP4/32"
> ifconfig_lo1_alias1="inet6 IP6/128"
> cloned_interfaces="lo1"
> create_args_lo1="inet6 auto_linklocal"
>
>
> As a result I have:
>
> 1) inet6 ::1 prefixlen 128   is configured on lo1 (I want it to stay at lo0)
> 2) IP6 alias is missing from lo1 at all
>
> I can achieve the desired configuration from command line, but I am unable to do the same via rc.conf.

I don't have much experiences with IPv6.
Can you post 'ifconfig' output with right (manual) settings and the 
second one with the wrong settings you have from rc.conf?

Miroslav Lachman