# bad (interface unlnown in this cope) group declaration config

# authoritative is mandatory
authoritative;

# parameter which will be changed in subnet
default-lease-time 1200;

# group declaration
group foobar {
    # interface
    interface "foo";

    # DHCPv4 subnet declaration
    subnet 10.5.5.0 netmask 255.255.255.224 {
        # at least one pool is required
        pool {
            range 10.5.5.5 10.5.5.10;
        }
	interface "bar";
    }
}