Modular layer-4 switch with 12 zl module slots (Fast Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet, optional support for PoE+, service and wireless modules). Supports OpenFlow for software-defined networking--no additional licences required. More Features: Advanced Quality of Service (QoS), Management ProVision and Comware, distributed trunking, support for IPv6, 2 Tb/s switching fabric, RIP and OSPF routing. At least two power supplies is required for operation (not included); four free power supply slots. Includes: - 1 Management Module (J9827A) - 1 fan (J9832A) - 3 24-port Module (J9986A) - 1 20-port Module (J9990A) - Rack-mount kit Please note: Mixing different types of power supplies is not possible.