Switching

This code does not work in our EX-4600, is there a way to make it work.?

        ##
        ## Warning: configuration block ignored: unsupported platform (ex4600-40f)
        ##
        dhcp {
            maximum-lease-time 1000;
            default-lease-time 1000;
            domain-name mass.com;
            name-server {
                10.10.10.10;
                10.2.0.1;
                10.2.0.3;
            }
            domain-search {
                mass.com;
            }
            router {
                10.10.110.254;
            }
            server-identifier 10.10.9.254;
        }
    }

This gives an overview of new ELS switch syntax:

http://www.juniper.net/documentation/en_US/junos14.1/topics/task/configuration/dhcp-server-cli-els.html