DGS-3120-48PC

The DGS-3120 xStack switch series includes stackable Layer 2+ switches that provide secure connection of end users to the network of large enterprises and small and medium-sized enterprises (SMB). Switches provide physical stacking, static routing, multicast group support, and advanced security features. All this makes this device an ideal Gigabit access level solution. The DGS-3120-24TC/48TC series switches are equipped with 20 or 44 10/100/1000 Mbit/s Gigabit Ethernet ports and 4 1000BASE-T/SFP Gigabit Ethernet combo ports. The DGS-3120-24PC/48PC series switches are equipped with 24 or 48 10/100/1000 Mbps PoE Gigabit Ethernet ports and 4 1000BASE-T/SFP Gigabit Ethernet combo ports. The DGS-3120-24SC/48SC-DC series switches are equipped with 16 SFP Gigabit Ethernet ports and 8 1000BASE-T/SFP Gigabit combo ports. Each 10/100/1000 Mbps port of the DGS-3120-24PC/48PC switches supports 802.3af and 802.3at Power over Ethernet. By default, the total power budget is 370 watts, which can be increased to 740 watts when using an additional DPS–700 power supply. The switch also supports a CardReader for reading SD memory cards, which allows downloading software and configuration files directly from the SD card. Moreover, the system log files can also be saved on the card.

Standard Image (SI), Enhanced Image (EI) and Routed Image (RI) software

The DGS-3120 series switches support three different software versions: Standard Image (SI), Enhanced Image (EI) and Routed Image (RI).

Switches with the standard software version (SI) support functions for building campus- or enterprise-scale networks, including physical stacking, advanced Quality of Service (QoS) settings, traffic restriction, layer 2 multicast, various security and IPv6 functions used in new generation networks with IPv6 support or for Triple play applications in Metro Ethernet networks.

Switches with an extended software version (EI), in addition to the SI functional, support ERPS, Double VLAN (Q-in-Q), Ethernet OAM, Static Route, IMPB and sFlow.

Routed Image (RI) software includes support for DHCP server, VRRP, IPv6 tunneling, RIP, OSPF, IGMP, MLD, PIM and DVMRPv3. However, Routed Image (RI) does not support physical stacking.
Increased network reliability
The DGS-3120 series switches are designed for enterprise/campus networks, as well as for users who require a high level of network security and maximum performance. All models of the DGS-3120 series switches (except DGS-3120-24SC-DC) support the connection of an external backup power supply, thus ensuring continuous operation. The switches also support the 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 functions, which increase network fault tolerance.

The G.8032 Ethernet Ring Protection Switching (ERPS) function provides a failure recovery time of less than 50ms. To distribute the load and increase fault tolerance when using multiple switches, the DGS-3120 series supports the dynamic 802.3ad Link Aggregation Port Trunking function.

Advanced security features
The DGS-3120 series switches support the latest security features such as Multi-Level Access Control Lists (ACLs), Storm Control and IP-MAC-Port Binding (IMPB) with DHCP Snooping. The IP-MAC-Port Binding function binds the source IP address to the corresponding MAC address for a specific port number, contributing to increased access security. Thanks to the DHCP Snooping function, the switch automatically detects IP/MAC address pairs, tracking DHCP packets and storing them in the IMPB white list. In addition, the D-Link Safeguard Engine function provides identification and prioritization of packets intended for CPU processing to prevent network attacks and protect the control interface of the switch.

Identity Driven Network Policies
The DGS-3120 series switches support authentication mechanisms such as 802.1X, Web-based Access Control (WAC) and MAC-based Access Control, ensuring ease of network deployment. After authentication, individual policies such as VLAN affiliation, QoS policies, and ACL rules can be assigned to each host. In addition, the switch supports Microsoft® NAP (Network Access Protection). NAP technology allows users to deny access to the network to computers that do not meet the established security requirements.

Traffic management for Triple Play services
The DGS-3120 series provides a set of multi-level QoS/CoS functions that ensure that latency-critical network services such as VoIP, video conferencing, IPTV and IP video surveillance will be served with proper priority. Traffic Shaping functions provide guaranteed bandwidth for these services in case of high network load. Thanks to the support of layer 2 multicast, the DGS-3120 switch implements the processing of IPTV applications that are in growing demand in the market. IGMP/MLD host-based Snooping provides connection of several multicast group clients to one interface, the ISM VLAN function sends Multicast streams to a special Multicast VLAN in order to save bandwidth and increase network security. ISM VLAN profiles allow users to assign/replace preset settings on multicast subscriber ports quickly and easily.

Efficient network management
To fulfill the SLA (Service Level Agreement), providers need to strive to reduce the average time to restore the device's operability (Mean Time to Repair - MTTR) and increase the availability of services. The Ethernet OAM functionality helps to solve these problems and allows providers to ensure the best quality of services provided. The DGS-3120 series switches support standardized OAM functions, including IEEE 802.3ah, IEEE802.1ag and ITU-T Y.1731. Connectivity Fault Management (CFM) provides monitoring, troubleshooting and troubleshooting functions in Ethernet networks, allowing you to monitor the connection, isolate problem areas of the network and identify customers to whom network restrictions have been applied.

IPv6 technology
The DGS-3120 series switches are fully compatible with next-generation IPv6-based networks. They support IPv6 remote management via telnet, HTTP or SNMP. To organize secure IPv6 networks, the DGS-3120 series switches use IPv6 ACL, DHCPv6 Snooping and Neighbor Discovery (ND) neighbor tracking functions to protect the network from unauthorized IPv6 clients. Switches of this series have successfully passed IPv6 Logo Phase 2 certification from IPv6 Forum, a global alliance of the industry, whose main activity is to ensure the implementation and development of IPv6 technology. The IPv6 Ready Logo Certification Program provides IPv6 hardware testing for interoperability and protocol compliance.

D-Link Green Technology
D-Link takes a leading position in the development of innovative energy-saving technology that does not reduce the performance and functionality of the device. The DGS-3120 series switches support D-Link Green technology, which allows you to use energy conservation mode, reduce heat generation, and also automatically reduce power consumption depending on the length of the cable. The power saving function provides automatic power off of inactive ports. The Smart Fan function automatically turns on the built-in fans at a certain temperature, ensuring long-lasting, reliable and environmentally friendly operation of the switch.

Management
The D-Link Single IP Management (SIM) function simplifies and speeds up management, since it is possible to configure, monitor and maintain multiple switches by connecting to a single IP address from any computer with Web browser support. Due to the use of this technology in the implementation of management, all devices in the virtual stack are considered as a single object and are controlled through a single IP address. The DGS-3120 series switches support standardized management protocols, including SNMP, RMON, Telnet, Console, GUI, and SSH/SSL authentication protocols.

Specifications
Basic
• Interface
+ 44 10/100/1000BASE-T
+ 4 combo ports 10/100/1000BASE-T/SFP
+ 2 10G CX4
• Backup power supply: DPS-700
• Console port: RJ-45
• 2 ports for stacking
• 1 SD card slot

Efficiency
• Switching matrix: 136 Gbit/s
• 64-byte packet forwarding rate: 101.19 Mpps
• Packet Buffer: 2 MB
• Flash memory: 32 MB

PoE
• PoE Standard
+ 802.3af and 802.3at
• PoE power budget
+ 370W
+ 740W (with DPS-700 RPS)

Software
Software Features Standard Image (SI)
Stacking
• Physical stacking
+ Bandwidth for stacking up to 40 Gbit/s
+ Up to 6 devices combined in a stack
• Virtual stacking:
+ D-Link Single IP Management (SIM) technology
+ Up to 32 devices in a virtual stack

Level 2 functions
• MAC Address table: 16K
• Flow control
+ 802.3x Flow control
+ Prevention of HOL locks
• Jumbo frame up to 13 KB
• Spanning Tree
+ 802.1D STP
+ 802.1w RSTP
+ 802.1s MSTP
+ BDPU Filtering
+ Root Restriction
• Loopback Detection Function
• Ethernet Ring Protection Switching (ERPS) Technology
• 802.3ad Link Aggregation
+ Max. 32 groups per device/8 ports per group
• Port mirroring
+ One-to-One
+ Many-to-One
+ Based on the flow
+ RSPAN

Level 2 multicast
• IGMP Snooping
+ IGMP v1/v2/v3 Snooping
+ Support for 1024 IGMP groups