Advanced Layer 2/3/4 Gigabit Ethernet switches with two built-in high-performance stacking ports and one expansion slot for up to two optional 10-Gigabit ports or eight additional Gigabit SFP ports. Non-PoE and PoE models; field upgradable to PoE. Advanced Layer 3 routing-including OSPF, PIM-SM, PIM-DM, and RIPv1/v2. All models have Gigabit SFP mini-GBIC ports for fiber flexibility. Advanced eight-high stacking with 96 Gbps available stacking bandwidth, distributed link aggregation, distributed routing, and single IP management.