Poe switch rackmount switch switching ports 48 gigabit ethernet ports 48 x rj 45 4 x sfp switch type standalone management managed layer 2 network standards vlan quality of services qos full duplex link layer discovery protocol lldp spanning tree protocol stp link aggregation lag link aggregation control protocol lacp weighted round robin wrr igmp snooping dhcp snooping loop detection backplane bandwidth 96 gbs packet forwarding rate 7142 max