xStack Gigabit L2 Stackable Managed Switches

DGS‑3120 Series

  • Product Status (Hardware revision: Bx): Live

The DGS-3120 xStack Series switches 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.

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The DGS 3120 Series xStack Gigabit L2 Stackable Managed Switches consists of:

  • DGS-3120-24TC: 24-Port Gigabit L2 Stackable Managed Switch including 4 x Combo 1000BASE-T/SFP ports and 2 x 10 Gbps stacking ports (smart fans)
  • DGS-3120-24PC: 24-Port Gigabit L2 Stackable Managed PoE Switch including 4 x Combo 1000BASE-T/SFP ports and 2 x 10 Gbps stacking ports (24 x PoE ports, smart fans)
  • DGS-3120-24SC: 24-Port Gigabit SFP L2 Stackable Managed Switch including 8 x Combo 1000BASE-T/SFP ports and 2 x 10 Gbps stacking ports (smart fans)
  • DGS-3120-48TC: 48-Port Gigabit L2 Stackable Managed Switch including 4 x Combo 1000BASE-T/SFP ports and 2 x 10 Gbps stacking ports (smart fans)
  • DGS-3120-48PC: 48-Port Gigabit L2 Stackable Managed PoE Switch including 4 x Combo 1000BASE-T/SFP ports and 2 x 10 Gbps stacking ports (48 x PoE ports, smart fans)

Below optional upgrade licence available to upgrade from Standard Image (SI) to Enhanced Image (EI):

  • DGS-3120-24TC-SE-LIC: DGS-3120-24TC Standard to Enhanced Image Upgrade License
  • DGS-3120-24PC-SE-LIC: DGS-3120-24PC Standard to Enhanced Image Upgrade License
  • DGS-3120-24SC-SE-LIC: DGS-3120-24SC Standard to Enhanced Image Upgrade License
  • DGS-3120-48TC-SE-LIC: DGS-3120-48TC Standard to Enhanced Image Upgrade License
  • DGS-3120-48PC-SE-LIC: DGS-3120-48PC Standard to Enhanced Image Upgrade License

The DGS-3120 xStack Series switches 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 24 or 48 10/100/1000 Mbps PoE Gigabit Ethernet ports and 4 combo 1000BASE-T/SFP Gigabit Ethernet ports. The DGS-3120-24SC provides 16 SFP Gigabit Ethernet ports and 8 combo 1000BASE-T/SFP Gigabit ports. Each 10/100/1000 Mbps port on the DGS-3120-24PC/48PC supports the 802.3af and 802.3at Power over Ethernet standards. The default power budget for these models is 370 watts and can be expanded to 760 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 as well as conveniently save syslog files onto the SD Card.

Standard and Enhanced Images

The DGS-3120 Series is embedded with two different software images - the Standard Image (SI) and Enhanced Image (EI). The Standard Image provides sophisticated features for campus or enterprise usage. It includes advanced Quality of Service (QoS), traffic shaping, L2 multicasting, robust security features, and IPv6 features which are suitable for next-generation IPv6 networks or triple play applications over Metro Ethernet*. The Enhanced Image supports ERPS, Double VLAN (Q-in-Q), Ethernet OAM, Static Route, IMPB, and sFlow.

Enhanced Network Reliability

The DGS-3120 Series targets enterprises, campuses, and customers who require a high level of network security and maximum uptime. 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 enhances network resilience. G.8032 Ethernet Ring Protection Switching (ERPS) minimizes the recovery time to 50ms. For load sharing and redundancy backup in a switch cascading/server attachment configuration, the DGS-3120 Series provides dynamic 802.3ad Link Aggregation Port Trunking.

Comprehensive Security

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 such as VoIP, video conferencing, IPTV, and IP surveillance are given high priority. Traffic Shaping features guarantee bandwidth for these services when the network is busy. L2 Multicast support enables the DGS-3120 to handle growing IPTV bandwidth requirements. Host-based IGMP/MLD Snooping allows multiple multicast subscribers per physical interface and 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 their 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, IEEE802.1ag, 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.

IPv6 Technology

The DGS-3120 Series is fully compliant with 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 Neighbour 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 ensures the 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 D-Link Green Technology, which includes a power saving mode, Smart Fan, reduced heat, and cable length detection. The power-saving feature automatically powers down ports that are detected to have no link or link partner. The Smart Fan feature allows for the built-in fans to automatically turn on at a certain temperature, providing continuous, reliable, and eco-friendly operation of the switch.

Manageability

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.

* Supports IPv6 in firmware R3.0 SI and above.

Related Products

D‑View 7 Network Management System
DV-700
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50 cm 10 GbE Stacking Cable for DGS‑3120, DGS‑3300, DXS‑3300 Series
DEM-CB50
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100 cm 10 GbE Stacking Cable for DGS‑3120, DGS‑3300, DXS‑3300 Series
DEM-CB100
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50 cm Interconnect Cable for DGS‑3120 series and DMC‑805X
DEM-CB50ICX
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589 Watt Redundant Power Supply for D‑Link Managed Switches
DPS-700
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Specs

Type Managed
Number of ports 16 to 28 ports

48 to 52 ports
Layer Layer 2

Layer 2+
Main type of ports 1000BASE-T Gigabit Ethernet

SFP
Type of uplink ports Combo 1000BASE-T/SFP
Switching capacity 136 Gbps

88 Gbps
PoE options 802.3af

802.3at
Number of PoE ports 24

48
PoE power budget 201 to 400W

740W (with optional DPS-700)
D-Link Green
Supported
Form Factor Rackmountable
Physical stacking Up to 40 Gbps bidirectional bandwidth

Up to 6 devices
Virtual stacking (up to 32 devices)
Supported
MAC address 16K
Spanning Tree Protocol 802.1D STP

802.1s MSTP

802.1w RSTP
Ethernet ring protection switching (ERPS)
Supported
Link aggregation 802.3ad
VLAN group (max static) 4K
VLAN type GVRP

MAC-based

Port-based

Protocol-based
Advanced VLAN Double VLAN (Q-in-Q)

ISM VLAN

Voice VLAN
IPv4/IPv6 routing table IPv4 - 512

IPv6 - 512
IP interfaces 16
IPv6 Ready
Supported
Static route for IPv4/IPv6 IPv4 - 512

IPv6 - 512
Number of QoS queues per port 8
CoS based on contents
Supported
Bandwidth control 64 Kbps minimum granularity
Time-based QoS
Supported
ACL type Egress

Ingress

VLAN-based
ACL based on packet contents
Supported
Time-based ACL
Supported
Encryption protocol supported SSH

SSL (v1/v2/v3)
IP-MAC-port binding (IMPB) / Smart Binding
Supported
ARP spoofing
Supported
BPDU attack protection
Supported
802.1X access control
Supported
Microsoft NAP support
Supported
RADIUS/TACACS+ authentication
Supported
SNMP (v1/v2c/v3)
Supported
RMON v1/v2
Supported
LLDP-MED
Supported
ICMPv6
Supported
802.3ah
Supported
802.1ag
Supported
ITU-T Y.1731
Supported

FAQ

  • Why doesn’t my DGS-3120 Series Stack work? Read Answer
  • How to Enable SHA-1 Encryption User Mode - DGS-3120-Series Read Answer
  • How to restore the switch s configuration backup file from an SD card Read Answer
  • How to Configure Stacking - DGS-3120-Series Read Answer

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