Solved jail's ip6=disable errors out with "unknown parameter"

[loveydovey]

In the jail's man page it says ip6 has the same options as ip4. So I launch the jail with ip4=disable and ip6=disable. But it complains about the ip6 option saying it's an "unknown parameter".

Here's what the man page says:
ip4 Control the availability of IPv4 addresses. Possible values
are "inherit" to allow unrestricted access to all system ad-
dresses, "new" to restrict addresses via ip4.addr, and
"disable" to stop the jail from using IPv4 entirely. Setting
the ip4.addr parameter implies a value of "new".

ip6.addr, ip6.saddrsel, ip6
A set of IPv6 options for the jail, the counterparts to
ip4.addr, ip4.saddrsel and ip4 above.

 

[loveydovey]

Ou em gee, it's because I compiled my kernel without INET6, so the jail doesn't know about the ip6 parameter. Solved!