D-Link DGS-3427 Product Manual - Page 227
NLB Multicast FDB Settings, NLB Multicast FDB Table window
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xStack® DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch From / To Select a range of ports. Admin State Enable or disable the administration state. This indicates these ports unidirectional link detection status. The default state is Disabled. Mode Toggle between Shutdown and Normal. When Shutdown is selected, if any unidirectional link is detected, this feature will disable the port and log an event. When Normal is selected, this feature will only log an event when a unidirectional link is detected. Discovery Time (5- Enter the port neighbor discovery time between 5 and 65535 seconds. If the discovery is timed 65535 sec) out, the unidirectional link detection will start. The default discovery time is 5 seconds Click Apply to implement the changes. NLB Multicast FDB Settings The Switch supports Network Load Balancing (NLB). This is a MAC forwarding control for supporting the Microsoft server load balancing application where multiple servers can share the same IP address and MAC address. The requests from clients will be forwarded to all servers, but will only be processed by one of them. The server can work in two different modes - unicast mode and multicast mode. In unicast mode, the client uses a unicast MAC address as the destination MAC to reach the server. In multicast mode, the client uses a multicast MAC address as the destination MAC to reach the server. The destination MAC is the shared MAC. The server uses its own MAC address (rather than the shared MAC) as the source MAC address of the reply packet.The NLB multicast FDB entry will be mutually exclusive with the L2 multicast entry. At the current time, only multicase mode is supported. To view this window, click L2 Features > NLB Multicast FDB Settings, as shown below. Figure 3 - 82 NLB Multicast FDB Table window To remove an entry from the table, click its corresponding under the Delete heading. To add a new entry, click Add to see the window shown below. Figure 3 - 83 NLB Multicast FDB Settings - Add window The following fields can be set: Parameter Description 218