Supported combinations of SFP and SFP+ modules: Slots 1, 2, 3, and 4 populated with 1-Gigabit SFP modules. Slots 1 and 2 populated with 1-Gigabit SFP modules, and Slot 4 populated with one 10-Gigabit SFP+ module. Slot 3 and Slot 4 each populated with 10-Gigabit SFP+ modules.