D-LINK DGS-3620-52T, 48-ports 10/100/1000Base-T L3 Stackable Management Switch with 4-ports SFP+, Redundant power supply support DPS-500, administrator-definable port security, 176Gbps switching fabric, 32K MAC address, 802.3ad Link Aggregation port trunks of up to 32 groups/8, Jumbo frame support, IP routing supporting RIPv1, RIPv2, OSPFv2,OSPFv3, BGPv4, VRF, VRRP, PIM SM, PIM SSM, IGMP v1/v2/v3, 4K 802.1Q VLANs, Guest VLAN, IGMP snooping, MLD snooping, 802.1p 8 Priority Queues, MPLS, Port mirroring, Bandwidth Control/Per flow bandwidth control per port granularity 64Kb/s, ACL ingress max 6 profiles and 256 rules, egress max 4 profiles and 256 rules, 802.1x Port- and MAC-based Access Control, Broadcast/Multicast Storm Control, SNMP v.1, v.2c, v.3 support, RMON monitoring, Spanning Tree 802.1D/802.1w/802.1s MSTP, STP Loopback Detection, E-RPS, D-Link Safeguard Engine, SYSlog, Web-based management, Telnet, CLI through console port, Single IP Management