SPECIFICATION

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Port Standard & Functions 

•  IEEE 802.3 10BASE-T Ethernet (twisted-pair copper)
•  IEEE 802.3u 100BASE-TX Fast Ethernet (twisted-pair copper)
•  IEEE 802.3ab 1000BASE-T Gigabit Ethernet (twisted- pair copper)Auto-negotiation
•  IEEE 802.3x Flow Control support for Full-Duplex Mode.

Number of Ports

•  28 10/100/1000 Mbps Ports
•   4 SFP

Network Cables

• UTP Cat. 5, Cat. 5e (100 m max.)EIA/TIA-568 100-ohm STP (100 m max.)
• Full/Half Duplex
• Full/half duplex for 10/100 Mbps speeds Full duplex for Gigabit speed.

Media Interface Exchange

• Full duplex
• Performance

Switching Capacity 

• 40 Gbps

Transmission Method

• Store-and-forward

MAC Address Table

16K entries per device

MAC Address Update

• Up to 256 static MAC entries Enable/disable auto-learning of MAC addresses
• Maximum 64 bytes packet forwarding rate.
• 29.8Mpps

Packet Buffer Memory

• 1 MB per device.

Physical & Environmental

• AC Input 
• 100 to 240 VAC, 50/60 Hz internal universal power supply
• Maximum Power Consumption
• 14.06 W.

Standby Power Consumption

• 6.7 W/100 Vm,7.2 W/240 V
• Acoustics
• 0 dBA

Heat Dissipation

•  47.97 BTU/hr

Operating Temperature

• -5 to 50 °C (41 to 122 °F)

Storage Temperature

•  -20 to 70 °C (-4 to 158 °F)

Operating Humidity

• -5 to 50 °C (41 to 122 °F)

Dimensions (L x W x H)

• 17.32 x 5.51 x 1.73 inches (19” standard rack mounting width, 1U height).

Weight

• 4.85 lbs
• Diagnostic
• LEDs 
• Power (Per device)
• Link/Activity/Speed (Per 10/100/1000 Mbps port)
• Link/Activity/Speed (Per SFP port)
• Certifications
• FCC Class A, CE Class A, ICES-003, VCCI Class A, C-Tick, BSMI
• Safety
• UL/cUL, LVD.

MTBF

• 253,460 hours Software Specifications
• D-Link Single IP Management
• Virtual Stacking/Clustering of up to 32 devices.

L2 Features

• MAC Address Table
• 16K entries
• Flow Control
• 802.3x Flow Control
• HOL Blocking Prevention
• IGMP Snooping
• IGMP v1/v2 Snooping
• Supports 256 IGMP groups
• Supports at least 64 static multicast addresses
• IGMP per VLAN
• Supports IGMP Snooping Querier
• Spanning Tree Protocol
• 802.1D STP
• 802.1w RSTP
• 802.1s MSTP2
• Loopback Detection
• Port Mirroring
• One-to-One
• Many-to-One
• Supports Mirroring for Tx/Rx/Both
• 802.3ad Link Aggregation
• DGS-1500-20: Max. 10 groups per device, 8 ports per group
• Cable Diagnostics
• Configurable MDI/MDIX
• Multicast Filtering
• Forwards all unregistered groups
• Filters all unregistered groups
• Jumbo Frame
• Up to 10,000 bytes
• LLDP
• LLDP-MED
• VLAN
• 802.1Q
• VLAN Group
• Max. 4K static VLAN groups
• Max. 4094 VIDs
• GVRP
• Up to 256 dynamic VLANs
• Asymmetric VLAN
• Auto Voice VLAN
• Max. 10 user defined OUI
• Max. 8 default OUI
• Auto Surveillance VLAN
• QoS (Quality of Service)
• 802.1p Quality of Service
• 4 queues per port
• Queue Handling
• Strict
• Weighted Round Robin (WRR)
• CoS based on
• 802.1p Priority Queues
• DSCP
• ToS3
• IPv6 Traffic Class3
• IPv6 flow label3
• TCP/UDP port3
• Bandwidth Control
• Port-based (Ingress/Egress, min. granularity 10/100/1000 is 64 Kb/s

L3 Features

• ARP
• 64 Static ARP
• Supports Gratuitous ARP
• IPv6 Neighbor Discovery (ND)2
• IP Interface
• Supports 4 interfaces

L3 Routing

• Default Routing
• Static Routing
• Max. 32 IPv4 Static Route entries
• Max. 128 IPv4 Host Routes
• Max. 16 IPv6 Static Route entries2
• Max. 64 IPv6 Host Routes2
• MAC Address
• Ether Type
• IPv4 Address
• DSCP
• Protocol Type
• Security

Port Security

• Supports up to 64 MAC addresses per port
• Broadcast/Multicast/Unicast Storm Control
• D-Link Safeguard Engine
• 802.1X Port-based Access Control
• DHCP Server Screening
• IP-MAC-Port Binding2
• Supports 512 address binding entries
• ARP mode
• ACL mode
• Supports DHCP Snooping
• ARP Spoofing Prevention
• Max. 64 entries
• Traffic Segmentation
• SSL
• Supports v1/v2/v3
• Supports IPv63

AAA

• 802.1X Authentication
• Supports local/ RADIUS database
• Supports Port-based access control
• Supports EAP, OTP, TLS, TTLS, PEAP
• IPv6 RADIUS Server

MIB

• 1213 MIB II
• 1493 Bridge MIB
• 1907 SNMP v2 MIB
• 1215 Trap Convention MIB
• 2233 Interface Group MIB
• D-Link Private MIB
• LLDP MIB
• Power-Ethernet MIB3
• RFC Standard Compliance
• RFC Standard Compliance
• RFC 783 TFTP
• RFC 854 Telnet Server
• RFC 951 BootP/DHCP Client
• RFC 1157 SNMP v1, v2, v3
• RFC 1213 MIB II
• RFC 1215 MIB Traps Convention
• RFC 1350 TFTP
• RFC 1493 Bridge MIB
• RFC 1769 SNTP
• RFC 1542 BootP/DHCP Client
• RFC 1901 SNMP v1, v2, v3
• RFC 1907 SNMP v2 MIB
• RFC 1908 SNMP v1, v2, v3
• RFC 2068 FCS
• RFC 2131 BootP/DHCP Client
• RFC 2138 RADIUS Authentication
• RFC 2139 RADIUS Authentication
• RFC 2233 Interface Group MIB
• RFC-2246 SSL
• RFC 2475
• RFC 2570 SNMP v1, v2, v3
• RFC 2575 SNMP v1, v2, v3
• RFC 2598 CoS
• OAM
• Cable Diagnostics
• Factory Reset

Management

• Web-based GUI
• Single IP Management
• Compact CLI
• Telnet Server
• TFTP Client
• Configurable MDI/MDIX
• SNMP
• Supports v1/v2/v3
• SNMP Trap
• Trap for SmartConsole Utility
• System Log
• Max. 500 log entries
• BootP/DHCP Client
• ICMP v62
• IPv4/v6 Dual Stack
• DHCP Auto Configuration
• Debug Command
• Time Setting
• SNTP
• RMONv1
• Trusted Host
• Time-based PoE3
• User Account
• Upload/Download Configuration file
• Backup/Upgrade firmware
• Smart Wizard
• SNTP
• Green™ V3.0 Technology

Power Saving by:

• Link Status
• Cable Length
• LED Shutoff
• Port Standby
• System Hibernation