Rackmount switch switching ports 26 gigabit ethernet ports 24 x rj 45 2 x sfp switch type standalone management managed layer 2 network standards link layer discovery protocol lldp link aggregation lag spanning tree protocol stp link aggregation control protocol lacp vlan jumbo frames igmp snooping energy efficient ethernet flow control full duplex loop detection broadcast storm control quality of services qos port mirroring auto negotiation backplane