random_ip within a jail

[Ernie Luzar]

tatools via freebsd-questions wrote:
> Hi all,
> i will configure a FreeBSD 12 Jail (with root) with "sysctl net.inet.ip.random_id=1".
> But: "sysctl: net.inet.ip.random_id=1: Operation not permitted"
> Does not that work within a jail?
> 
> Greetings
> 

The subject says random_ip and posted message says random_id.
Which one is correct?