dgs-3130-30s l3 stackable managed switch, 24x sfp, 2x 10g rj-45, 2x 10g sfp +the stackable l3 gigabit ethernet switch is designed to meet the needs of corporate networks. the switch offers 24 gigabit sfp slots and six embedded 10g ports. the two 10gbase-t rj-45 metal ports and the four 1g/10g sfp + two-port ports allow flexible selection of hw stacking, uplink, or server connections. redundancy of the power supply of the switch can be ensured by an optional external dps-500a psu.the basic version of the dgs-3130 series switch software includes an advanced set of l2 features as well as l3 features such as 16 ip interfaces, ipv4/ipv6 static routing, rip v1/v2 dynamic routing, ripng, and vrrp for redundancy. switches dgs-3130 offers comprehensive management capabilities through web interface, standardized cli commands via serial console or telnet or snmp commands. d-link network assistant (dna) or d-view7 (dv-700) nmp platforms are used for central management.dgs-3130 series switches support hw stacking for simple management, flexibility and network redundancy. up to 9 switches can be connected to the stack, stacking up to 80gb/s (4x 10g ports in full duplex). at stacking, stacking cost of all stack switches must not exceed 12, when each 30-port model (30ts, 30ps, 30s) has a stacking cost = 1 and each 54-port model (54ts, 54ps, 54s) has a stacking cost = 2. there may be up to nine 30-port models (stacking cost = 9x1 = 9), but up to only six 54-port models (stacking cost = 6x2 = 12) eg 5x 54-port model and 2x 30-port model (ie stacking cost = 5x2 + 2x1 = 12).