vnet flag?

[Nick Dalsheimer]

Hey all,
Whenever I specify
     jail_jailname_flags="vnet"
in /etc/rc.conf, and then run "/etc/rc.d/jail start" as root, I always
get an error like this:

   Configuring jails:.
   Starting jails: cannot start jail "jailname":
   But it doesn't look like one.
   .

and it exits without starting the jail. If I remove the vnet option,
everything runs as planned. What am I doing wrong?

Thanks in advance,
Nick