D-Link Managed Layer 3 Gigabit Master Stacking Switch

24-Port Managed Layer 3 Gigabit Master Stacking Switch
The DGS-3324SRi is a powerful, function-rich Layer 3 switch that acts as a Stacking Master, as well as a high port-density Gigabit switch with 24 copper and fiber Gigabit connections. This switch operates as a high-performance external switching fabric for D-Link's DGS-3224SR stackable switches by increasing the available stacking interconnect bandwidth from 20Gbps to 120Gbps.

Cost-Effective Backbone Stacking Master
The DGS-3324SRi combines powerful stacking bandwidth with Layer 3 packet routing and extensive network management capability. It is suitable for deployment as a cost-effective Stacking Master on a fiber backbone. The DGS-3324SRi can provide as much as 120Gbps stacking bandwidth to a stack of DGS-3324SR Layer 3 Gigabit switches for fault tolerant connection to enterprise/ Departmental servers and workstations. The high availability architecture of the DGS-3324SRi supports Layer 3 routing (RIP-1/RIP-2, OSPF, and DVMRP), multi-layer traffic classification/prioritization and optional redundant power.

Star Stacking Architecture
DGS-3324SRi comes with 6 stacking ports operating in full duplex, allowing 6 units of DGS-3324SR to be stacked together in a fail-safe star architecture. You can add units to reach maximum 168 Gigabit ports per 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 from the 7- segment display on the front panel of each switch.

High Port-Density, High Performance
In a low profile rack-mount box, the DGS-3324SRi 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 8 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 will disable their corresponding built-in 10/100/1000BASE-T connections.

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 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.

Seamless Integration
The DGS-3324SRi can be instantly integrated into any existing network for seamless integration of Layer 2 and Layer 3 packet switching. With multi-layer support for every port, you can flexibly segment the network into domains and subdomains, using (1) subnet IDs and user IP numbers to route traffic, and (2) custom filters based on users' physical MAC addresses to filter extraneous traffic. On Layer 2, the DGS-3324SRi uses auto-learned and user-defined MAC addresses to discard and forward packets to the L2 switch stack. On Layer 3, the DGS-3324SRi looks at the user specified routing table to route packets to their destinations on other L3 Stacking Masters on the fiber backbone.

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. The DGS-3324SRi can support up to 32 port trunks per device.

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.

* Function available in next firmware release

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.

D-Link Managed Layer 3 Gigabit Master Stacking Switch, IEEE 802.1D, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1w, IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE..., 16000 entries, 1 Gbit/s, Power, 2 MB, 0 - 40 °C