From top-to-bottom: the Base and Fabric gigabit Ethernet 10/100BASE-TX management port, the Base 10/100/1000BASE-T ports 18-20, the Base serial management port, the power LED, the Fabric gigabit Ethernet serial management port, the Base 10/100/1000BASE-T ports 21-24, the Fabric gigabit Ethernet 10/100/1000BASE-T ports 17-20, and the Fabric gigabit Ethernet 10/100/1000BASE-T ports 21-24.