User manual D-LINK DEM-340T BROCHURE

[. . . ] This compares favorably with the ring architecture, where a fail over link between any 2 switches can break the link of an entire stack. Higher Performance Switch Stacking Instead of a 2Gbps bandwidth shared by the entire stack in a ring architecture, the DGS-3312SR gives each of the switches on the stack a dedicated 2Gbps bandwidth from a Stacking Master stacking port. This brings the total bandwidth up to 24Gbps when 12 switches are stacked through the Stacking Master. Scalable Expansion With 288 10/100BASE-TX & 12 Gigabit Ports By stacking a DGS-3312SR with 12 DES-3226S switches, you can have as many as 288 10/100BASE-TX ports for departmental user connection, plus 12 Gigabit ports for server and backbone attachment. [. . . ] You can flexibly segment the network into domains and sub-domains, 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. At Layer 2, the switch uses autolearned and user-defined MAC addresses to discard and forward packets. At Layer 3, it looks at the user-specified routing table to route packets to their destinations. VLANs for Enhanced Security & Performance The DGS-3312SR supports 802. 1Q and port-based VLANs to improve security and bandwidth utilization. This limits the broadcast domains and confines intra-group traffic within their segments. The switch also supports GVRP (GARP VLAN Registration Protocol) for automatic VLAN configuration distribution. Advanced Network Access Management 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 based on TCP/UDP port number. Advanced CoS 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 allows you to attach IP telephony devices or video servers to the switch to run delay-sensitive applications like video conference. The DGS-3312SR supports up to 8 CoS (Class of Service) queues in the stand-alone mode, and up to 4 CoS queues in the Stacking Master mode. Flexible Transmission Scheduling The switch supports 2 methods of packet transmission scheduling: Strict Priority Queuing and Weighted Round-Robin (WRR). [. . . ] Multiple Management Interfaces SNMP v. 1, v. 3 network management is supported, using the builtin MIBs. 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. [. . . ]