Limiting dhcp server to mac addresses

I followed:

http://osdir.com/ml/os.solaris.managers/2003-03/msg00240.html

I did in /etc/dhcp3/dhcpd.conf

#declarations des hosts : adresses ethernet
host emily { hardware ethernet 00:0b:db:6f:c7:4c;}
host wembley { hardware ethernet 00:0b:db:6f:e7:5f; }
host gobo { hardware ethernet 00:0b:db:6f:c7:5f; }

/etc/init.d/dhcp3-server restart