XB6 Gateway Only Has 2 Ethernet Ports

I have a new XB6 Gateway.  I need more than 2 ethernet ports.  I have been told that you can plug a 5 or 8 port switch into one of the ethernet ports on the back of the XB6.  Is there any configuration needed on the Gateway or switch?  Does DHCP need to be configured manually?

Any Tips would be appreciated.  Thanks in advance!