Metro Ethernet xStack 24-port 10/100Mbps Layer 2 Managed Switch + 2 x 100/1000 SFP + 2 x Combo 10/100/1000Base-T/100/1000 SFP
- Metro class Layer 2 Management Switch
- All Ethernet ports support IEC61000-4-5 10/700us 6KV surge protection
- Certified MEF 21 and IPv6 Ready Logo.
- Switching Capacity 12.8 Gbps
- Empty expansion slots with following available modules:
     Gigabit SFP Modules: DEM-310GT, DEM-311GT, DEM-314GT, DEM-315GT
     100BaseFX Modules: DEM-210, DEM-211

Stackability
- Virtual Stacking – D-Link Single IP management – Up to 32 units per Virtual Stack

L2 Features
- MAC address Table :8k
- Flow Control – 802.3x Flow Control  - HoL Blocking Prevention
- Jumbo Frames up to 2048 bytes
- Spanning Tree Protocols – 802.1D STP, 802.1w RSTP, 802.1s MSTP, 802.1Q-2005 MSTP, BPDU filtering, Root Restriction.
- Loopback Detection
- Link Aggregation – Compliant with 802.1ax and 802.3ad,
- IEEE 802.3ad Link Aggregation (14 ports/group, up to 8 ports per group)
- Port Mirroring: Supports 1 Mirroring group. Supports One-to- One, Many-to-one, Flow-based (ACL) Mirroring
- Ethernet Ring Protection Switching (ERPS)
- L2 Protocol Tunneling

L2 Multicasting 
- IGMP Snooping: IGMP V1/v2 Snooping, IGMP v3 awareness. Supports 1K groups. Port/Host-based IGMP Snooping Fast Leave.
- Limited IP Multicasting: Up to 24 IGMP filtering profiles, 128 ranges per profile
- MLD Snooping, MLD v1, MLD v2 awareness, Supports 1K groups. IGMP Authentication 
VLAN
- 802.1A Ragged VLAN, VLAN Group: - Max 4K VLAN. Port-based VLAN, MAC-basedVLAN. GVRP – Max 255 dynamic VLANS. 802.1v Protocol VLAN. VLAN Trunking. Asymmetric VLAN. Double VLAN (Q-in-Q) Port-based Q-inQ, Selective Q-in-Q. ISM VLAN. VLAN Translation

L3 Features
- Gratuitous ARP

Quality of Service (QoS)
- Bandwidth Control – Port based (Ingress/Egress, min granularity 62.5kbps). Per egress queue bandwidth control. 4 queues per port. DSCP, 802.1p. Queue Handling: Strict Priority, Weighted Round Robin 9WRR) Strict+WRR. CoS Based on: Switch Port, VLAN ID, 802.1p Priority Queue, MAC address, Ether Type, IPv4/v6 Address, IPv6 Traffic Class, IPv6 Flow Label, TOS, DSCP, Protocol Type, TCP/UDP Port, User-defined  packet content.
- Time-based QoS
- Supports the following actions for flows: - Remark 802.1p Priority Tag, Remark ToS/DSCP Tag, Bandwidth Control, Flow Statistics,

Access Control Lists (ACL)
- Up to 512 ingress access rules. 
- ACL based on: Swtich Port , VLAN ID, 802.1p Priority Queues, MAC Address, Ether Type, IPv4/v6 Address, IPv6 Traffic Class, IPv6 Flow Label, TOS, DSCP, Protocol Type, TCP/UDP Port, User-defined  packet content.
- Time based ACL
-ACL Statistics
- CPU Interface Filtering 

Security
- SSH v2, SSL v1/v2/v3, Port Security: up to 64 MAC addresses per port. Broadcast/Multicast/Unicast Storm Control. Traffic segmentation.
IP-MAC-Port Binding (IMPB)
- ARP- Inspection, IP Inspectionm DHCP Snooping.
D-Link Safeguard Engine, DHCP Server Screening, DHCP Client Filtering, DoS Attack Prevention and BPDU Attack Pretection. 
 

AAA
- 802.1x: Port-based Access Control, Host-based access Control, Dynamic VLAN Assignment, Identity-driven security policy assignment: QOs, VLAN.
- MAC-based Access Control (MAC); Port-based Access Control, Host-based access Control, Dynamic VLAN Assignment, Authentication Database failover, Identity-driven security policy assignment: QoS ACL, VLAN.
- Microsoft NAP 9IPv4.v6): Supports 802.1x NAP, supports DHCP NAP.
- Guest VLAN, RADIUS, TACACS+, XTACACS+, Trusted Host, RADIUS Accounting, Two-level User Account. 

Management
-Web-based GUI (supports IPv4/v6), Command Line Interface (CLI), Telnet Server/Client (Supports IPv4/v6), TFTP Clients (supports IPv4/v6), Zmodem, SNMP v1/v2c/v3, SNMP Traps, System Log, RMON v1:Supports 1,2,3,9 Groups, RMON v2: Supports ProbeConfig group. BootP/DHCP Client, DHCP Auto-Configuration. DHCP Relay. DHCP Relay Option 12. DHCP Relay Option 82. PPPoE Circuit-ID Tag Insertion. Dual Image. CPU Monitoring. SNTP. LLDP. Debug Command. Password Encryption. SMTP. Ping (Support IPv4/v6). Traceroute (supports IPv4). Command logging. ICMPv6. Microsoft NLB (Network Load Balancing) Support

OAM
-Cable Diagnostics, 802.3ah Ethernet Link OAM, Dying Gasp, 802.1ag Connectivity Fault Management (CFM), 802.3ah D-Link Extension: D-Link Unidirectional Link Detection 9DULD)

MIB and IETF Standard refer to Datasheets

- 19" Rackmount Size

Note: Draft specifications subject to change