D-LINK DGS-3324SR 24Port 10/ 100/ 1000Giga Layer3 StackSwitch w/ 4Port ComboGBIC

Product Features:
24 10/100/1000BASE-T Gigabit ports
4 combo SFP (Mini GBIC) ports
Up to 12 units per stack (ring architecture) or 6 units + 1 Stacking Master per stack (star architecture)
Recoverable ring stacking or fail-safe star stacking
Redundant power supply support
88Gbps switching fabric
Auto MDI/MDIX uplink for all twisted-pair ports
IP routing supporting RIP-1, RIP-2, OSPF routing protocols, DVMRP, PIM Dense mode
4K 802.1Q VLANs, IGMP snooping, eight 802.1p Priority Queues, port mirroring
Multi-layer ACL and DiffServ QoS
Administrator-definable port security
802.3ad Link Aggregation port trunks of up to 8 Gigabit ports
Broadcast storm control
802.3x Flow Control
Jumbo frame support
802.1D compatible and 802.1w Rapid Spanning Tree for redundant backup bridge paths
Single IP address management per stack, SNMP v.1, v.2c, v.3 support, RMON monitoring, SYSlog, web-based management, Telnet, CLI through console port
802.1x port-based/MAC-based access control
Per-port bandwidth control

Product Description:
Stackable Gigabit Ethernet Layer 3 Managed Switch
The DGS-3324SR stackable Gigabit switch is a high-performance Layer 3 switch designed for business enterprise connection. It provides 24 1000BASE-T copper Gigabit ports, 4 combo SFP (Mini GBIC) ports for fiber attachment, redundant power support, and scalable expansion through switch stacking. This switch blends wire-speed packet routing with many features typically found in more expensive chassis-based solutions, including performance, high port density, unit hot swap and redundant power backup, with the price and flexibility of a stackable.

High Port Density, High Performance
In a low profile rack-mount box, the DGS-3324SR gives you 24 10/100/1000BASE-T Gigabit ports for 24 Gigabit connections on your existing Cat. 5 twisted-pair cable. In addition, it also gives you 4 SFP (Mini GBIC) ports for flexible fiber connection. You can select to install optional transceiver modules in these slots for short, medium or long distance fiber backbone attachment. Use of the SFP GBIC will disable their corresponding built-in 10/100/1000BASE-T connections.

Scalable Expansion
Each DGS-3324SR comes with dual 10-Gigabit stacking ports, allowing up to 12 units of DGS-3324SR to be stacked together in a recoverable ring architecture. Alternately, 6 units of DGS-3324SR can be stacked with a DGS-3324Sri Stacking Master in a fail-safe star architecture. You can add units to reach maximum 288 Gigabit ports per ring stack, or 168 Gigabit ports in a star stack. The switches are stacked together through high-speed stack cables that provide multiple Gigabit connections, allowing the entire stack to perform as a single IP entity. Users can easily see the ID
number of switches stacked together on the 7-segment display on the front panel of each switch.

Redundant Power Support
Each switch in the stack can be connected to an external power supply for redundant power backup purposes. In case the built-in internal power supply fails, the optional external redundant power supply unit will automatically provide all required power to ensure continuous operation.

Wire-speed IP Routing
The switch is designed for basic IP routing, with instant support for Windows, Unix and Internet environments. It provides wire-speed non-blocking switch fabrics with hardware-based packet filtering/forwarding. Packet routing is performed by on-board ASICs at speeds many times faster
than CPU-based routers.

Port Trunks for Aggregated Bandwidths
Port trunks supporting 802.3ad Link Aggregation standard allow up to 8 Gigabit ports to be combined together to create a multi-link load-sharing aggregated bandwidth. Port trunks can span multiple units of the stack for fail-safe connectivity to mission-critical servers and the network center. Up to 8 multi-link trunks can be configured for a stack.

VLANs for Enhanced Security & Performance
VLANs improve security and bandwidth utilization by limiting the broadcast domains and confining intra-group traffic within their segments. To segment up the network, workstations supporting IEEE 802.1Q VLAN Tagging connected to the switch can be grouped into different Virtual LANs (VLANs). The switch also supports GVRP (GARP VLAN Registration Protocol) for automatic VLAN configuration distribution.

Advanced Network Access Management
Port-based and MAC-based 802.1x features enable user authentication for each network access attempt. Port security features allow you to limit the number of MAC addresses per port in order to control the number of stations for each port. Static MAC addresses can be defined for each port to ensure only registered machines are allowed to access. By enabling both of these features, you can establish an access mechanism based on user and machine identities, as well as control the number of access stations.

Multi-layer Access Control List (ACL)
Access Control Lists (ACL) allow the network administrator to define policies on network traffic control. The switch supports comprehensive and multi-layer ACLs, providing a powerful tool for network management. For example, the switch can be set to block malicious bulk traffic from specific clients (based either on MAC or IP addresses). Or during a virus attack, the switch can be set to restrict its flooding based on a virus's unique pattern (TCP/UDP port number).

Advanced QoS Support
The switch supports not only Layer 2 802.1p Priority Queue control, but also a variety of ways to prioritize network packets. Multi-layer information from L2 to L4 can be used to classify packet priorities. This function support allows you to attach IP telephony devices or video servers to the switch to run delay-sensitive applications like video conference.

Flexible Transmission Scheduling
The switch supports 2 methods of packet transmission scheduling: Strict Priority Scheduling and Round-Robin. You can select to use Strict Priority Scheduling to strictly enforce your priority queues, or Round-Robin to address bandwidth limitations at peak time. Round-Robin allows each queue to be assigned a different percentage of the output port's bandwidth, so that lower-priority queues are not denied access to buffer space and port bandwidth.

IGMP Snooping for Broadcast Control
The switch listens to IGMP (Internet Group Management Protocol) messages to build mapping table and associate forwarding filters. It dynamically configures the switch ports to forward IP multicast traffic only to those ports associated with multicast hosts.

Broadcast Storm Control
To limit too many broadcast/multicast flooding in the network, broadcast/multicast storm control is configured to screen excessive traffic. Threshold values are available to control the rate limit for each port. Packets are discarded if the respective count exceeds the configured upper threshold in a given time interval. The possible range of upper threshold is from 0 to 255k packets per second.

Port Mirroring
This function allows you to mirror adjacent ports for the purpose of analyzing incoming and outgoing packets where packet patterns can be studied.

802.1D Compatible & 802.1w Rapid Spanning Tree
For mission critical environments with multiple switches supporting STP, you can configure the stack of switches with a redundant backup bridge path, so transmission and reception of packets can be guaranteed in event of any fail-over switch on the network.

Multiple Management Interfaces
SNMP v.1, v.2c, v.3 network management with single IP address per stack is supported. RMON monitoring and SYSLOG are provided for effective central management. The switch also provides a Command Line Interface (CLI) and a Web-based GUI. CLI enables quick system configuration for administrators familiar with command line operation. The embedded Web-based interface allows you to easily access the switch from anywhere on the network and troubleshoot it in real-time. You can, for example, browse the MAC address table via the Web browser and perform searching to identify the location of any workstation. Port utilization graphs provide real-time traffic monitoring and diagnostic information.