D-Link xStack DGS-3120-24PC/SI Ethernet Switch
xStack 24Port Managed Gigabit L2+ Stackable Switch RJ45 SI Image
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The DGS-3120 xStack Series are enhanced L2 access stackable switches designed to connect end-users in a secure SMB or enterprise network. These switches support physical stacking, multicast and enhanced security, making them an ideal Gigabit access layer solution. The DGS-3120-24TC/48TC provides 20 or 44 10/100/1000 Mbps Gigabit Ethernet ports and 4 combo 1000BASE-T/SFP Gigabit Ethernet ports. The DGS-3120-24PC/48PC provides 20 or 44 10/100/1000 Mbps PoE Gigabit Ethernet ports and 4 combo 1000BASE-T/SFP Gigabit Ethernet ports. Each 10/100/1000 Mbps port of DGS-3120-24PC/48PC supports IEEE 802.3af and IEEE 802.3at Power over Ethernet standard. The default power budget is 370 Watts and can be expanded to 740 Watts with the DPS-700 RPS. The switches are also equipped with an SD Card slot, allowing the user to boot images and upload configuration files directly from an SD Card. Furthermore, syslog files can also be conveniently saved to a card.
Standard and Enhanced Images
The DGS-3120 Series is available with two different software images - Standard Image (SI) and Enhanced Image (EI). The Standard Image provides sophisticated features for campus, or enterprise. It includes advanced Quality of Service (QoS), traffic shaping, L2 multicasting, and robust security features. The Enhanced Image supports ERPS, Double VLAN (Q-in-Q), Ethernet OAM, Static Route, IMPB, sFlow, IPv6 features which are suitable for the next generation IPv6 networks or triple play applications in Metro Ethernet.
Enhanced Network Reliability
The DGS-3120 Series targets enterprise/campus and customers who require a high level of network security and maximum uptime. All the models in DGS-3120 Series support an external redundant power supply so that continued operation can be assured. They also include other features, such as 802.1D Spanning Tree (STP), 802.1w Rapid Spanning Tree (RSTP) and 802.1s Multiple Spanning Tree (MSTP), Loopback Detection (LBD), and Broadcast Storm Control, that enhance network resilience. The G.8032 Ethernet Ring Protection Switching (ERPS) function minimizes the recovery time to 50 ms2. For load sharing and redundancy backup in switch cascading/server attachment configuration, the DGS-3120 Series provides dynamic 802.3ad Link Aggregation Port Trunking.
The DGS-3120 Series provides users with the latest security features such as Multi-layer and Packet Content Access Control Lists (ACL), Storm Control, and IP-MAC-Port Binding (IMPB) with DHCP Snooping. The IP-MAC-Port Binding feature allows administrators to bind a source IP address with an associated MAC and also define the port number to enhance user access control. With the DHCP Snooping feature, the switch automatically learns IP/MAC pairs by snooping DHCP packets and saving them to the IMPB white list. In addition, the D-Link Safeguard Engine identifies and prioritizes “CPU interested” packets to prevent malicious traffic from interrupting normal network flows, and to protect switch operation.
Identity Driven Network Policies
The DGS-3120 Series supports authentication mechanisms such as 802.1X, Web-based Access Control (WAC), and MAC-based Access Control (MAC) for strict access control and easy deployment. After authentication, individual policies such as VLAN membership, QoS policies, and ACL rules can be assigned to each host. In addition, the switch also supports Microsoft® NAP (Network Access Protection). NAP is a policy enforcement technology that allows customers to protect network assets from unhealthy computers by enforcing compliance with network health policies.
Traffic Management for Triple Play
The DGS-3120 Series implements a rich set of multilayer QoS/CoS features to ensure that critical network services like VoIP, video conference, IPTV and IP surveillance are served with high priority. The Traffic Shaping features guarantee bandwidth of these services when the network is busy. With L2 Multicast support, the DGS-3120 shows its ability to handle growing IPTV applications. Host-based IGMP/MLD Snooping allows multiple multicast subscribers per physical interface, ISM VLAN sends multicast streams in a multicast VLAN to save bandwidth and to provide better security to the backbone network. The ISM VLAN profiles allow users to bind/replace the pre-defined multicast registration information to subscriber ports quickly and easily
Proactive, Effective Network Management
To uphold enterprise customers’ Service Level Agreements (SLA), service providers must reduce the Mean Time to Repair (MTTR) and increase service availability. Ethernet OAM features address these challenges and enable service providers to offer carrier-grade services. The DGS-3120 Series supports industry-standard OAM tools, including IEEE 802.3ah, IEEE 802.1ag, and ITU-T Y.1731. Connectivity Fault Management (CFM) provides tools to monitor and troubleshoot end-to-end Ethernet networks, allowing service providers to check connectivity, isolate network issues, and identify customers affected by network issues.
The DGS-3120 Series is fully compliant with the future IPv6 networks. It supports remote IPv6 manageability from telnet, HTTP, or SNMP. To create secure IPv6 networks, the DGS-3120 Series uses IPv6 ACL, DHCPv6 Snooping and Neighbor Discovery (ND) Snooping functions to protect the network from illegal IPv6 clients. The DGS-3120 Series has been certified with IPv6 Ready Logo Phase 2 from the IPv6 forum, a worldwide IPv6 advocacy consortium. The IPv6 Ready Logo Program provides conformance and interoperability of IPv6 products.
D-Link Green Technology
D-Link is striving to take the lead in developing innovative and power-saving technology that does not sacrifice operational performance or functionality. The DGS-3120 Series implements the D-Link Green Technology, which includes a power saving mode, smart fan, reduced heat dissipation, and cable length detection. The power saving feature automatically powers down ports that have no link or link partner. The Smart Fan feature allows for the built-in fans to automatically adjust their speed at a certain temperature, providing continuous, reliable and eco-friendly operation of the switch.
D-Link’s Single IP Management (SIM) simplifies and speeds up management tasks, allowing multiple switches to be configured, monitored and maintained from any workstation running a web browser through one unique IP address. This virtual stack is managed as a single object, having all units maintained by one IP address. The DGS-3120 Series also supports standard-based management protocols such as SNMP, RMON, Telnet, Console, Web-based GUI and SSH/SSL security authentication.
- Redundant Power Supply (RPS) support
- 802.1D/802.1w/802.1s Spanning Tree
- L2/L3/L4 Multi-Layer Access Control
- External RADIUS/TACACS+ Authentication
- SSH/SSL support
- 802.1X Guest VLAN
- Web-based Access Control (WAC)
- MAC-based Access Control (MAC)
- D-Link Safeguard Engine
- Supports Microsoft® NAP
Traffic Monitoring/Bandwidth Control
- Traffic Segmentation
- Granular Bandwidth Control Down to 64 Kbps per port
- 802.3ad Link Aggregation
- RMON support
- Port mirroring
- 802.3ah Ethernet Link OAM
- 802.1ag, ITU-T Y.1731 Service OAM
- Web-based GUI
- Command Line Interface (CLI)
- SNMP v1, v2c, v3
- D-Link Single IP Management (SIM)
- Multiple Images/Configurations
- DHCP Server
- LLDP, LLDP-MED
|D-Link DGS-3120 Series Specifications|
|Interfaces Console Port||
|Optional Redundant Power Supply||DPS-200||DPS-500||DPS-700||DPS-700|
|SD Card Slot||1|
|Switching Capacity||88 Gbps||136 Gbps||88 Gbps||136 Gbps|
|64-Byte Packet Forwarding Rate||65.48 Mpps||101.19 Mpps||65.48 Mpps||101.19 Mpps|
|Packet Buffer Memory||2 MB|
|Flash Memory||32 MB|
|Standards||-||IEEE 802.3af and 802.3at|
|Physical & Environment|
|MTBF (Hours)||561,829 Hours||292,201 Hours||282,541 Hours||223,006 Hours|
|Acoustics||Max: 44.2 db;
Min: 28.1 db
|Max: 45.2 db;
Min: 35.7 db
|Max: 52.5 db;
Min: 38.1 db
|Max: 52.3 db;
Min: 38.4 db
|Heat Dissipation||138.11 BTU/h||228.8 BTU/h||1646.0 BTU/h
(with 370W PoE load),
(with 740W PoE load)
(with 370 W PoE load),
(with 740W PoE load)
|Power Input||100 to 240 VAC, 50 to 60 Hz Internal Universal Power Suppy||100 to 240 VAC, 50 to 60 Hz Internal Universal Power Supply||100 to 240 VAC, 50 to 60 Hz Internal Universal Power Supply||100 to 240 VAC, 50 to 60 Hz Internal Universal Power Supply|
|Max Power Consumption||40.5 Watts||67.1 Watts||482.7 Watts (with 370W PoE load): 935.1 Watts (with 740W PoE load)||516.5 Watts (with 370W PoE load), 970.8 Watts (with 740W PoE load)|
|Dimensions (W x D x H)||17.3” x 8.27” x 1.73” (440 x 210 x 44 mm)||17.3” x 12.2” x 1.73” (440 x 310 x 44 mm)||17.3” x 12.2” x 1.73” (440 x 310 x 44 mm)||17.3” x 14.96” x 1.73” (440 x 380 x 44mm)|
|Weight||5.64lbs (2559 g)||10.17lbs (4615g)||11.95lbs (5423g)||13.96lbs (6331g)|
|Smart Fan||> 40˚ C: High Speed;
< 35˚ C: Low Speed
|Operating Temperature||32˚ to 122˚F (0 to 50 ˚C)|
|Storage Temperature||-40˚ to 158˚ F (-40 to 70 ˚C)|
|Operating Humidity||10% to 90% RH|
|Storage Humidity||5% to 90% RH|
|Emission (EMI)||FCC Class A,
CE Class A, VCCI
Class A, IC
|Safety||CB, cUL, LVD|
|Certification||IPv6 Ready Logo Phase 2|
|Standard Image (SI) Features|
|QoS (Quality of Service)||
|Access Control List (ACL)||
|D-Link Green Features||
|Operation, Administration & Management (OAM)||Cable Diagnostics|
|RFC Standard Compliance||
|Enhanced Image (EI) : Includes support for all Standard Image (SI) Features as well as the features below|
|Access Control List (ACL)||
|Operation, Administration & Management (OAM)||
1 Supported in DGS-3120-24PC and DGS-3120-48PC only.
2 50ms response time based on an ITU-T G.8032 recommended environment
Download the D-Link DGS-3120-24PC/SI Datasheet (PDF).