Next Generation Intelligent Layer 3+ Chassis SwitchThe SBx8106 compact, 4RU advanced Layer 3+ chassis features 6 slots and an included fan module.Total slots: 6Control Fabric Card (CFC) Slots: 1 or 2Line Card Slots: 4 or 5Two system and two PoE power supplies and a fan tray, along with the cards, are all hot-swappable.