HP ProCurve 5412zl Layer 3 Switch - 12 Slot - 12 x Expansion Slot Slot. The ProCurve Switch 5412zl consists of the most advanced intelligent edge switch in the ProCurve Networking product line. The foundation of this switch is a purpose-built, programmable ProVision ASIC that allows the most demanding networking features, such as QoS and security, to be implemented in a scalable yet granular fashion. With a variety of Gigabit interfaces, 10-GbE capability, and a choice of form factors, the 5412zl switch offer excellent investment protection, flexibility, and scalability, as well as ease of deployment, operation, and maintenance.