D-Link DGS-1510 User Manual - Page 150
MST Configuration Identification, Guard Root, Link Type, Shared, Port Fast, Network, Disabled
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DGS-1510 Series Gigabit Ethernet SmartPro Switch Web UI Reference Guide Parameter Guard Root Link Type Port Fast TCN Filter BPDU Forward Priority Hello Time Description Select to enable or disable the guard root function. Select the link type option here. Options to choose from are Auto, P2P, and Shared. A full-duplex port is considered to have a pointto-point (P2P) connection. On the opposite, a half-duplex port is considered to have a Shared connection. The port cannot transit into the forwarding state rapidly by setting the link type to Shared. By default, this option is Auto. Select the port fast option here. Options to choose from are: • Network - The port remains in the non-port-fast state for three seconds. The port will change to the port-fast state if no BPDU is received and changes to the forwarding state. If the port received the BPDU later, it will change to the nonport-fast state. This is the default option. • Disabled - The port is always in the non-port-fast state. It will always wait for the forward-time delay to change to the forwarding state. • Edge - The port directly changes to the spanning-tree forwarding state when a link-up occurs without waiting for the forward-time delay. If the interface receives a BPDU later, its operation state changes to the non-port-fast state. Select to enable or disable the TCN filter option. Enabling TC filtering on a port is useful for an ISP to prevent the external bridge to a core region of the network, causing address flushing in that region, possibly, because those bridges are not under the full control of the administrator. When a port is set to the TCN filter mode, the TC event received by the port will be ignored. By default, this option is Disabled. Select to enable or disable BPDU forwarding. If enabled, the received STP BPDU will be forwarded to all VLAN member ports in the untagged form. By default, this option is Disabled. Select the priority value here. Options to choose from are 0 to 240. By default, this option is 128. A lower value has higher priority. Enter the hello time value here. This value must be between 1 and 2 seconds. This value specifies the interval that a designated port will wait between the periodic transmissions of each configuration message. Click the Apply button to accept the changes made. MST Configuration Identification This window is used to view and configure the MST configuration identification settings. These settings will uniquely identify a multiple spanning tree instance set on the Switch. The Switch initially 139
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