D-Link xStack DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch

Introduction

Overview

The D-Link xStack DGS-3400 Series comprises stackable Layer 2 Gigabit Ethernet managed switches designed for high-performance network environments. These switches offer fault tolerance, flexibility, robust security features, and a user-friendly management interface. The series includes models such as the DGS-3426, DGS-3426P (with Power over Ethernet capabilities), DGS-3427, and DGS-3450. They are equipped with a combination of 10/100/1000BASE-T ports, SFP combo ports for fiber optic uplinks, and optional 10-Gigabit uplink modules (XFP or CX4) for high-speed connectivity.

Key Features

• IEEE 802.3 standards compliance
• 802.1p Priority Queues
• 802.3ad Link Aggregation
• 802.1X Port/MAC-based Access Control
• 802.1Q VLAN support
• Spanning Tree protocols (802.1D, 802.1W, 802.1s)
• Power-over-Ethernet (PoE) on DGS-3426P
• Stacking support (Duplex-Ring or Duplex-Chain)
• Access Control List (ACL)
• Single IP Management
• Secure Sockets Layer (SSL) and Secure Shell (SSH) support
• IPv6 support
• High performance switching up to 128Gbps

Ports

The switches offer various port configurations:

• 24 or 48 x 10/100/1000BASE-T Gigabit Ethernet ports
• 4 x Combo SFP Ports for fiber uplinks
• Optional slots for single-port 10GE XFP or 10GBASE-CX4 modules
• 1 x RS-232 DB-9 console port for management

Installation

Package Contents

Standard package includes the switch, AC power cord, mounting kit, rubber feet, RS-232 console cable, and documentation CD.

Installation Guidelines

Install on a stable surface supporting at least 3 kg. Ensure adequate ventilation: at least 10 cm (4 inches) clearance at the front and rear, and 6 inches at the sides. Avoid dusty, humid, or high electromagnetic interference environments. Rubber feet are provided for desktop placement.

Rack Mounting

The switches can be mounted in a standard 19-inch rack using the included mounting brackets and screws. Follow rack manufacturer guidelines for stability, especially when installing multiple components.

Powering On

Connect the AC power cord to the switch and a grounded power outlet. Upon power-up, LEDs will briefly illuminate, indicating a system reset.

SFP and Optional Module Installation

SFP ports accept fiber-optic transceivers for extended-reach gigabit links. Optional 10GE modules (DEM-410X for XFP, DEM-410CX for CX4) can be installed in rear slots to enable high-speed stacking or uplinks. Always disconnect power before installing or removing modules.

External Redundant Power System (RPS)

An optional external redundant power supply (DPS-500 or DPS-600 for DGS-3426P) can be connected to the switch for power redundancy, ensuring continuous operation during power failures.

Connecting the Switch

Switch to End Node

Connect end devices like PCs or routers equipped with RJ-45 Ethernet NICs to the switch's 10/100/1000BASE-T ports using standard twisted-pair UTP/STP cables. Link/Act LEDs will indicate connection status and activity.

Switch to Switch

Link switches using appropriate cabling: Category 5e/6 UTP/STP for copper connections, or fiber-optic cables for SFP ports. 10GE modules require specific CX4 or fiber cables.

Connecting to Network Backbone or Server

Utilize Gigabit Ethernet ports or SFP combo ports for uplinks to network backbones, servers, or server farms. Fiber-optic ports require fiber cables, while copper ports use Category 5e or higher.

Switch Management

Management Options

The switches can be managed through three primary methods:

• Web-based Management: Accessible via a web browser, offering a graphical user interface.
• SNMP: Supports SNMP versions 1, 2c, and 3 for network management stations.
• Console Port (CLI): Direct command-line access via an RS-232 serial connection.

Console Port Connection

Connect a computer or terminal to the switch's RS-232 DB-9 console port using a null modem or crossover cable. Terminal emulation settings should be configured as follows: 115200 baud, 8 data bits, 1 stop bit, no parity, VT100 emulation.

Initial Login and Password Protection

There is no default username or password. For initial access via CLI, press Enter twice. It is crucial to create administrator accounts immediately using the CLI command create account admin <username>. Passwords are case-sensitive.

IP Address Assignment

The default IP address is 10.90.90.90. An IP address must be assigned for network management. This can be done manually via CLI or the Web GUI, or automatically via BOOTP or DHCP. The IP address is essential for Telnet, Web, and SNMP management.

SNMP Settings

Configure SNMP versions, community strings (e.g., public for read-only, private for read-write), and trap destinations. SNMP v3 provides enhanced security features.

Web-based Configuration

Logging In

Access the Web Manager by entering the switch's IP address in a web browser (e.g., http://10.90.90.90). Leave username and password fields blank for the initial login.

User Interface Overview

The interface typically includes a navigation menu, a status display area, and a main content pane for configuration and monitoring.

Key Configuration Areas

Device Information

View and configure system details such as MAC address, firmware version, system name, location, and contact information. Essential for tracking updates and identifying the device.

Interface Settings (IPv4 & IPv6)

Configure IP addresses, subnet masks, and default gateways for IPv4 interfaces. Set up IPv6 addresses, link-local addresses, and manage IPv6 routing parameters.

Stacking

Configure stacking modes (Duplex-Ring, Duplex-Chain), manage switch roles (Primary Master, Backup Master, Slave), and enable/disable stacking. Supports hot-swapping of switches.

Port Configuration

Manage individual port settings: enable/disable ports, set speed and duplex modes (auto-negotiation, fixed), configure flow control, and manage MAC address learning. Combo ports allow selection of medium type (copper/fiber).

User Accounts

Create and manage user accounts with different privilege levels (Admin, User) for secure access to the switch's management interface.

Port Mirroring

Copy traffic from source ports to a designated target port for network monitoring and troubleshooting. Specify direction (ingress, egress, both) and status.

System Log

Configure Syslog server settings to send log messages to remote servers. Define log save modes (Time Interval, On Demand, On Trigger) and severity levels for alerts.

SNTP Settings

Configure Simple Network Time Protocol (SNTP) for time synchronization. Set time zone, Daylight Saving Time (DST) rules, and SNTP server addresses.

TFTP Services

Utilize Trivial File Transfer Protocol (TFTP) for firmware upgrades, configuration file transfers, and log uploads/downloads.

Ping Test

Perform connectivity tests using ICMP Echo packets for both IPv4 and IPv6 addresses to diagnose network issues.

Safeguard Engine

Protect the switch from network attacks like ARP storms by controlling CPU utilization and traffic flow. Configure modes (Strict, Fuzzy) and thresholds.

Security Features

Implement security measures including 802.1X port-based authentication, SSL for secure web management, and SSH for secure remote CLI access.

Technical Specifications & Appendices

Detailed technical specifications, including performance metrics, environmental requirements, and compliance information, are provided in Appendix A. Additional appendices cover cables and connectors, cable lengths, switch log entries, glossary, warranties, technical support, and international office information.