Scratch of the day - ISC dhcpd is complaining about subnet declaration

Just now, restarting the ISC DHCP server, after adding new subnet, spill out some error messages :

No subnet declaration for gem0 (192.168.168.168).
** Ignoring requests on gem0.  If this is not what
   you want, please write a subnet declaration
   in your dhcpd.conf file for the network segment
   to which interface gem0 is attached. **

Sending on   Socket/fallback/fallback-net

This is because the DHCP server doesn't find any "subnet" declaration on the IP used on interface gem0. Tell DHCP server to listen on the intended interface by putting the below line in /etc/rc.conf :

dhcpd_ifaces="gem1"

This will make DHCP server listen on "gem1" and ignore listening on "gem0".

Adios !!!