Hi Partha,
I attached our topology in my first post here, if you take a look there, you can see that our EX8208's port that is connected to our Layer3 network is a trunk port(also this is the interface which goes to DHCP Server) so it is a trusted port. We don't have any access ports on EX, all the ports, either which are going up to DHCP server or down to our clients, are both trunk ports.