D-Link DGS-3420-28PC xStack 24-port L2+ Stackable Managed Gigabit PoE Switch, 20x gigabit, 4x SFP/gigabit, 4x SFP+

xStack 24-port 10/100/1000 Layer 2+ Stackable Managed PoE Gigabit Switch including 4-port Combo 1000BaseT/SFP plus 4 10GE SFP+ - Including 4 built-in Combo 1000BaseT/Mini-GBIC SFP ports - 4 10GE SFP+, up to 20G bandwidth for stacking or 40G bandwidth for uplink - Up to 12 units per stack with other DGS-3620 series switches - Up to 32 units per virtual stack (Single IP Management) - IEEE 802.3af and IEEE 802.3at PoE compliant - Maximum PoE output capacity 370W per device (740W with DPS-700 RPS) - Time-based PoE - IPv6 Ready Logo Phase I and Phase II , provides comprehensive IPv6 support including IPv6 Tunnel, ICMPv6, IPv6 Neighbor Discovery (ND), DHCPv6, RIPng - IEEE 802.3x Flow Control, Auto MDI/MDI-X on all twisted pair ports - MSTP, ERPS, LACP - IEEE 802.3ad Link Aggregatioin (32 groups per device, 8 ports per group) - 16K MAC address table, 1K routing table (shared by IPv4/6), 2K L3 forwarding table (shared by IPv4/6) - 256 Static IPv4/IPv6 Routes (shared by IPv4/6) - IEEE 802.1p Priority Queues (up to 8 queues) - Bandwidth Control (64Kbps granularity), Class of Service (CoS) - QoS based on IPv4 or IPv6 parameters - IEEE 802.1Q VLAN (4095 static, 255 dynamic groups) - Advanced Access Control List (ACL), Ingress ACL: support 6 profiles and 256 rules per profile, Egress ACL: support 4 profiles and 128 rules per profile - Advanced Security, RADIUS/TACACS+/SSHv2/SSLv3 - IEEE 802.1x Port, WAC/MAC based Access Control, MAC-IP Binding - Broadcast Storm Control, Traffic Segmentation - IGMP v1/2/3 Snooping, MLD Snooping - HTTP, Telnet, TFTP client, CLI, SYSLOG - SNMP v1/v2c/v3, RMONv1/v2 (4 groups) - Optional External Redundant power supply (DPS-700) - Smart fan, external SD card (for firmware, config file, boot image, syslog), external alarm port - 19-inch rackmount size