HP Networking 7502 Switch Chassis. 2 MPU (for management modules) slots + 2 I/O module slots + 2 power supply slots.

The HP 7500 Switch Series is a versatile modular switch designed to meet the evolving needs of integrated services networks. It can be deployed at the enterprise LAN core, aggregation layer and wiring closet edge and offers 40GbE connectivity, cost-effective wire-speed 10GbE ports, high density PoE/PoE+, advanced functionality with service modules and BYOD-ready features with the wired-WLAN module.

With HP Intelligent Resilient Fabric (IRF) technology, the HP 7500 Switch Series can be virtualized across four chassis with a single management interface--enabling flatter, more agile networks.