Cost-efficient SMB/SME access & aggregation solution.

OverView
The D-Link DGS-1250 Series Smart Managed Switches are the latest generation of switches to provide increased Power over Ethernet (PoE) output, high port density, multiple management interfaces, and advanced Layer 2 features. With all of these features combined, the DGS-1250 Series provides a cost-efficient and flexible solution for expanding any business network.

Easy Management
A multilingual Web UI, a Full CLI, and a variety of management features allow the switches to integrate with your existing network

Expand your Network
All models include high-speed 4 x 10G SFP+ uplink ports enabling easy expansion of your network

Power over Ethernet
Support for IEEE 802.3af/at and a higher PoE budget allow the PoE models in the series to power more devices with greater port density

High PoE Budget (370W)
The DGS-1250 series offers Power-over-Ethernet (PoE), which simplifies deployment with IP cameras, VoIP phones, Wireless Access Points, and other powered devices. Using the switch’s management interface, an administrator can control various PoE functions, such as remotely rebooting Cameras or Access Points, from anywhere on the network, including over the Internet. All PoE models support the IEEE 802.3af and 802.3at standards, and each PoE power budget varies per model.

Features
Green Technology
• Link status detection
• Port and LED shut-off
• System hibernation
• Time-based PoE (PoE models only)

Security Features
• Access Control Lists (ACLs)
• D-Link Safeguard Engine helps the CPU resist broadcast/multicast/unicast flooding
• Port Security supports up to 64 MAC addresses per port
• ARP Spoofing Prevention
• IMPB Support

Intuitive Management
• D-Link Network Assistant (DNA) utility or multilingual Web UI
• Built-in SNMP MIB for remote NMS (D-View 7.0)
• Full command line support via console port

Advanced Features
• Static routing
• Surveillance Mode
• Auto Voice VLAN
• Dual software images
• Dual configuration files

Seamless Integration
The DGS-1250 Series includes a wide range of port and media types. All models in the DGS-1250 Series feature four 10G SFP+ ports, allowing you to choose the most suitable media type for your requirements. All DGS-1250 Series PoE switches include support for IEEE 802.3af/at and higher power budgets, allowing more PoE devices to be powered by the switch and for devices to be installed in remote locations without immediate access to power outlets. Furthermore, the DGS-1250-28XMP and DGS-1250-52XMP can supply PoE power up to 370W providing even more power for connected devices.

Automatic Configuration
The DGS-1250 Series supports Auto Voice VLAN and Surveillance Mode, which allow Voice and Video traffic to be automatically identified and handled differently from regular network traffic. Auto Voice VLAN detects Voice over IP (VoIP) traffic and automatically segments it from the rest of the network, increasing security and allowing Quality of Service (QoS) to be applied.

Advanced Features
The DGS-1250 Series comes equipped with a complete lineup of L2 features, including IGMP snooping, port mirroring, Spanning Tree Protocol (STP), and Link Aggregation Control Protocol (LACP). The IEEE 802.3x Flow Control function allows servers to directly connect to the switch for fast, reliable data transfers. The DGS-1250 Series also supports advanced features such as static routing, which allow network administrators to divide the network into VLANs, increasing network efficiency. Network maintenance features include loopback detection and cable diagnostics. Loopback detection significantly speeds up troubleshooting by automatically detecting and shutting down switching loops. The cable diagnostics feature, designed primarily for administrators and customer service representatives, determines the cable quality and quickly discovers errors, allowing for swift diagnostics and maintenance.

Surveillance Mode
The DGS-1250 Series supports Auto Voice VLAN and Surveillance Mode, which allows voice and video traffic to be automatically identified and handled differently than regular network traffic. Auto Voice VLAN detects Voice over IP (VoIP) traffic and automatically segments it from the rest of the network, adding a layer of isolation and allowing Quality of Service (QoS) to be applied. Surveillance Mode detects compatible ONVIF cameras and places them in a surveillance VLAN, allowing a single switch to be used for voice, video, and data, removing the need for dedicated hardware and reducing maintenance costs. Surveillance Mode also includes its own Web UI, making surveillance features easily accessible and simplifying management of your surveillance network.

Advanced Access Control
D-Link’s innovative Safeguard Engine helps to protect the switches against traffic flooding caused by malicious attacks. The DGS-1250 Series supports 802.1X port-based authentication, allowing clients to be authenticated through external RADIUS servers. The Access Control List (ACL) feature helps to enhance network security and helps to protect the internal IT network. The DGS-1250 Series also features Address Resolution Protocol (ARP) spoofing prevention, which helps to provide protection from attacks on the network that could allow an intruder to sniff data frames, modify traffic, or bring traffic to a halt altogether by sending fake ARP messages. To help prevent ARP spoofing attacks, the switch uses packet control ACLs to block invalid packets that contain fake ARP messages. The DHCP server screening filters DHCP replies on unauthorized ports to prevent them from being assigned an IP address.

Versatile Management
The DGS-1250 Series comes with the D-Link Network Assistant (DNA) utility that enables administrators to remotely control their network down to the port level. The D-Link Network Assistant utility furthermore allows customers to easily discover multiple D-Link Smart Managed Switches within the same L2 network segment and display them onscreen for instant access. With this utility, users do not need to change the IP address of their PC. This allows for simultaneous configuration and setup of all discovered devices, including password changes and firmware upgrades. The DGS-1250 Series supports Command Line Interface (CLI) through console port. SNMP is also supported which allows for the central management of network assets, remote configuration, and logging functions

Easy Maintenance, Less Downtime
The DGS-1250 Series supports Dual Image and Dual Configuration functionality, as well as a Console Port, all of which make it easier to configure, troubleshoot, and make other changes without interfering with network operation, while full Command Line Interface (CLI) functionality enables remote configuration, without the need for the Internet. And if a network issue ever does occur, the supported Spanning Tree Protocols (STP/RSTP/MSTP) help keep things running without interruptions or downtime.

Technical Specifications

Order Information
DGS-1250-52XMP 48 Ports 10/100/1000 Mbps PoE + 4 Ports 10G SFP+ Smart Managed Switch

Hardware Version
• A1

General
Interfaces
48 x 10/100/1000BASE-T PoE
4 x 10G SFP+ ports

Port Standards
• IEEE 802.3 10BASE-T Ethernet (twisted-pair copper)
• IEEE 802.3u 100BASE-TX Fast Ethernet (twisted-pair copper)
• IEEE 802.3u 100BASE-FX 100 Mbps over fiber optic
• IEEE 802.3ab 1000BASE-T Gigabit Ethernet (twisted-pair copper)
• IEEE 802.3z 1000BASE-X 1 Gbps over fiber optic
• IEEE 802.3az Energy-Efficient Ethernet (EEE)
• IEEE 802.3x Flow Control
• IEEE 802.3ae 10 Gigabit Ethernet
• IEEE 802.3af/at

Network Cables
• UTP Cat. 5, Cat. 5e (100 m max.)

Duplex Mode
• Full/Half-duplex for 10/100 Mbps
• Full-duplex for 1000 Mbps

Media Interface Exchange
• Auto MDI/MDIX adjustment for all twisted-pair ports

Performance
Switching Capacity
• 176 Gbps

Transmission Method
• Store-and-forward

MAC Address Table
• 32K

Static MAC Addresses
• 256 entries

Maximum 64 Byte Packet Forwarding Rate
• 130.95 Mpps

Packet Buffer Memory
• 16 Mbits

CPU Memory
• 2G DDR3

Flash Memory
• 64 MB

PoE

PoE Standard
• IEEE 802.3af/at

PoE Capable Ports
• 48

PoE Power Budget
• 370 W
• 15.4 W per port

LEDs
Power (per device)
Yes

Link/Active/Speed (per RJ-45 port)
Yes

Link/Active/Speed (per 10G SFP+ port)
Yes

Physical

Power Input
• 100 to 240 V AC 50/60 Hz internal universal power supply

Maximum Power Consumption
• PoE On:
• 467.3 W/100 V
• 443.6 W/240 V
• PoE Off:
• 56.4 W/100 V
• 57.2 W/240 V

Standby Power Consumption
• 27.8 W/100 V
• 28.4 W/240 V

Acoustics
• Max: 51.2 dB(A)
• Min: 43.0 dB(A)

Heat Dissipation
• PoE On:
• 1593.493 BTU/hr (100 V)
• 1512.676 BTU/hr (240 V)
• PoE Off:
• 192.324 BTU/hr (100 V)
• 195.052 BTU/hr (240 V)

MTBF
• 309,053.10 hours

Operating Temperature
• -5 to 50°C (23 to 122°F)

Storage Temperature
• -20 to 70°C (-4 to 158°C)

Operating Humidity
• 0% to 95% relative humidity

Storage Humidity
• 0% to 95% relative humidity

Dimensions (L x W x H)
• 440 x 250 x 44 mm (17.32 x 9.84 x 1.73 in)

Weight
• 3.85 kg (8.49 lbs)

Certifications

Safety
• CB, UL, BSMI, CCC

EMI
• CE Class A, VCCI Class A, FCC Class A, IC, BSMI

Software
L2 Features
• MAC Address Table
• 16K entries
• 32K entries (DGS-1250-52X/52XMP only)
• IGMP Snooping
• IGMP v1/v2/v3 Snooping
• Supports 256 IGMP groups
• Supports at least 64 static multicast addresses
• IGMP per VLAN
• Supports IGMP Snooping Querier
• Loopback Detection
• 802.3ad Link Aggregation:
• Supports maximum 8 groups per per device and 8 ports per group
• LLDP
• LLDP-MED
• Jumbo Frame
• Up to 12,000 bytes
• Spanning Tree Protocol
• 802.1D STP
• 802.1W RSTP
• 802.1s MSTP
• Flow Control
• 802.3x Flow Control
• HOL Blocking Prevention
• Port Mirroring
• One-to-One
• Many-to-One
• Supports Mirroring for Tx/Rx/Both
• Multicast Filtering
• Forwards all registered groups
• Filters all unregistered groups
• Configurable MDI/MDIX
• MLD snooping v1/v2 awareness (256 groups)
• PD-Alive

VLAN
• 802.1Q
• VLAN Group
• Max. 4094 static VLAN groups
• Configurable VID from 1 – 4094
• Asymmetric VLAN
• Auto Voice VLAN
• Max. 10 user-defined OUI
• Max. 8 default OUI
• Auto Surveillance VLAN

Quality of Service (QoS)
• 802.1p Quality of Service
• 8 queues per port
• Queue Handling
• Strict
• Weighted Round Robin (WRR)
• Bandwidth Control
• Port-based (ingress/egress, min granularity 10/100/1000 is 16 Kbps)
• QoS based on:
• 802.1p priority queues
• DSCP
• MAC address
• EtherType
• IP address
• Protocol type
• ToS
• IP preference
• IPv6 Traffic Class
• TCP/UDP port

L3 Features
• IP interface
• Supports 4 interfaces
• IPv6 Neighbor Discovery (ND)
• Static routing
• 124 IPv4 static route entries
• 50 IPv6 static route entries

Access Control List (ACL)
• Max. 50 access lists
• Max. 768 rules shared by IPv4, MAC, and IPv6
• Each rule can only be associated with a single port
• ACL based on
• MAC address
• 802.1p priority mask
• VID mask
• Source/destination MAC address mask
• EtherType mask
• IP address
• Source/destination IP address mask
• DSCP mask
• Protocol type mask
• TCP/UDP port number mask
• IPv6 address
• Source/destination IP address mask
• DSCP mask
• Protocol type mask
• TCP/UDP port number mask
• IPv6 traffic class mask

Security Features
Broadcast/Multicast/Unicast Storm Control
D-Link Safeguard Engine
Traffic segmentation
SSH v2
TLS v.1.2
DoS attack prevention
802.1X Port-based Access Control
Port Security
Supports up to 64 MAC addresses per port
ARP Spoofing Prevention
Max. 127 entries
DHCP Server Screening
IP-MAC-Port Binding (Smart Binding)
ARP Inspection
Max. 64 entries
IPv4 Inspection
Max. 127 entries
IPv6 Inspection
Max. 63 entries
DHCP Snooping
Max. 512 entries

AAA
• 802.1X Authentication
• Supports local/RADIUS database
• Supports port-based access control
• Supports host-based access control
• Supports EAP, OTP, TLS, TTLS, PEAP
• IPv6 RADIUS server
• Support MD5 authentication
• Max. 128 entries when using local database

OAM
• Cable diagnostics
• Factory reset

Management
Web-based GUI
D-Link Network Assistant
Full CLI
Telnet Server
TFTP Client
Configurable MDI/MDIX
SNMP
Supports v1/v2c/v3
SNMP Trap
Backup/upgrade firmware
Smart Wizard
Upload/download configuration file
BootP/DHCP Client
System Log
Max. 500 log entries
SNTP
ICMP v6
IPv4/v6 Dual Stack
DHCP Auto Configuration
Time setting
SNTP
RMONv1
Trusted host
Dual image
Dual configur
Green V3.0 Technology
Power Saving by:
Link Status
Time-based PoE: PoE ports can be turned on/off by port or system through schedule
System hibernation
Port shut off
Cable length detection

MIBs
RFC1212 Concise MIB Definitions

RFC1213 MIBII

RFC1215 MIB Traps Convention

RFC1493 Bridge MIB

RFC1157, RFC2573, RFC2575, RFC2576 SNMP MIB

RFC1442, RFC1901, RFC1902, RFC1903, RFC1904, RFC1905, RFC1906, RFC1907, RFC1908, RFC2578, RFC3418 SNMPv2 MIB

RFC271, RFC1757, RFC2819 RMON MIB

RFC2021 RMONv2 MIB

RFC1398, RFC1643, RFC1650, RFC2358, RFC2665 Ether-like MIB

RFC2674 802.1p MIB

Interface Group MIB

RFC2618 RADIUS Authentication Client MIB

RFC4022 MIB for TCP

RFC4113 MIB for UDP

RFC2389 MIB for Diffserv.

RFC2620 RADIUS Accounting Client MIB

Private MIB

PoE MIB

DDP MIB

LLDP-MED MIB

RFC Standards
RFC791 IP
RFC768 UDP
RFC793 TCP
RFC792 ICMPv4
RFC2463, RFC4443 ICMPv6
RFC826 ARP
RFC1321, RFC2284, RFC2865, RFC2716, RFC3580 Extensible Authentication Protocol (EAP)
RFC2573 SNMP Applications
RFC2461, RFC4861 Neighbor Discovery for IPv6
RFC2462, RFC4862 IPv6 Stateless Address Auto-configuration (SLAAC)
RFC2464 IPv6 over Ethernet and definition
RFC4291 IPv6 Addressing Architecture
RFC2893, RFC4213 IPv4/IPv6 dual stack function

Package Contents
Open the shipping carton of the Switch and carefully unpack its contents. The carton should contain the following items:
 One DGS-1250-28XMP D-Link 24 Ports 10/100/1000 Mbps PoE + 4 Ports 10G SFP+ Smart Managed Switch.
 One Quick Installation Guide.
 One AC power cord.
 One console cable (RJ45 to RS-232).
 One rack mounting kit (two brackets and screws).
 Four rubber feet with adhesive backing.
 One power cord retainer set.