User manual D-LINK DEM-340MG BROCHURE

[. . . ] Fault Tolerant Switch Stacking Using 2 DEM-540 stacking modules and the 4 built-in 1000BASE-T/ SFP combo ports, the DGS-3312SR Stacking Master can stack up 12 D-Link stackable switches. The stacking scheme uses the star architecture, where packets are switched directly through the Stacking Master. This architecture provides for fault tolerance, as any single broken link between a switch and the Stacking Master will not affect the rest of the links of the stack. This compares favorably with the ring architecture, where a fail over link between any 2 switches can break the link of an entire stack. [. . . ] Packet routing is performed by on-board ASICs at speeds many times faster than CPU-based routers. DGS-3312SR Product Description Gigabit L3 Switch Seamless Integration The DGS-3312SR 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 start with Layer 2 switching, then upgrade to Layer 3 routing anytime by simply re-configuring the ports. 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. [. . . ]