D-Link DWS-3227 Product Manual - Page 204
Interface Priority, Path Cost, Designated Bridge ID, Forward, Transitions, Remain Hops, Designated
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Configuring Spanning Tree Defining Multiple Spanning Tree - Root - Provides the lowest cost path to forward packets to the root device. - Designated - Indicates the port or LAG through which the designated device is attached to the LAN. - Alternate - Provides an alternate path to the root device from the root interface. - Backup - Provides a backup path to the designated port path toward the Spanning Tree leaves. Backup ports occur only when two ports are connected in a loop by a point-to-point link or when a LAN has two or more connections connected to a shared segment. - Disabled - Indicates the port is not participating in the Spanning Tree. • Mode - Indicates the STP mode by which STP is enabled on the device. The possible field values are: - Classic STP - Classic STP is enabled on the device. This is the default value. - Rapid STP - Rapid STP is enabled on the device. - Multiple STP - Multiple STP is enabled on the device. • Interface Priority - Defines the interface priority for the specified instance. The default value is 128. • Path Cost - Indicates the port contribution to the Spanning Tree instance. The range should always be 1200,000,000. • Designated Bridge ID - Displays the ID of the bridge that connects the link or shared LAN to the root. • Designated Port ID - Displays the ID of the port on the designated bridge that connects the link or the shared LAN to the root. • Designated Cost - Indicates that the default path cost is assigned according to the method selected on the Spanning Tree Global Settings page. • Forward Transitions - Indicates the number of times the LAG State has changed from a Forwarding state to a Blocking state. • Remain Hops - Indicates the hops remaining to the next destination. 2. Click . The MSTP Interface Table opens. Page 203