An SFP+ expansion module can house up to eight 10-gigabit SFP+ transceivers or these 1-gigabit SFP transceivers or in any combination of SFP and SFP+ transceivers. You can use the ports on the expansion module to connect the switch to other devices. You can also configure these ports as Virtual Chassis ports (VCPs) and use them to connect the switch in a Virtual Chassis configuration.