jail-vimage.conf

test {
    host.hostname = "${name}";
    vnet=new;
    vnet.interface=epair0b;
    path ="/usr/jail/${name}";
    mount.devfs;
    allow.raw_sockets;
    devfs_ruleset=4;
    exec.prestart = "ifconfig epair0 create up; ifconfig bridge0 addm epair0a";
    exec.start = "/bin/sh /etc/rc";
    exec.stop = "ifconfig epair0b down; /bin/sh /etc/rc.shutdown";
    exec.poststop = "ifconfig epair0a destroy";
}