Advanced Layer 2/3/4 Gigabit Ethernet switches with two expansion slots for up to four optional 10-Gigabit ports or stacking ports. Non-PoE and PoE models. Advanced Layer 3 routing-including OSPF, PIM-SM, PIM-DM, and RIPv1/v2. Comprehensive IPv4/IPv6 operation. All models have Gigabit SFP mini-GBIC ports for fiber flexibility. Advanced nine-high stacking with 96 Gbps available stacking bandwidth, distributed link aggregation, distributed routing, and single IP management.