I have a DI-624 router with built in 4 port switch running my network as of right now.. I am wanting to expand to my network by adding an additional switch coming off my Dlink router/switch.. My question is can I do this even though my router has no upling port ?? can I just use an exisiting port to do so or do I need to by a router that supports and has a port for uplinking an additional switch to my network.