Dell PowerConnect 3524 User's Guide - Page 348
MSTP Interface Settings
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• Role - Indicates the port role assigned by the STP algorithm in order to provide to STP paths. The possible field values are: - Root - Provides the lowest cost path to forward packets to root device. - Designated - Indicates the port or LAG via 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. Backup ports also occur when a LAN has two or more connections connected to a shared segment. - Disabled - Indicates the port is not participating in the Spanning Tree. • Interface Priority - Defines the interface priority for specified instance. The default value is 128. • Path Cost - Indicates the port contribution to the Spanning Tree instance. The possible range is 1-200,000,000. • Default Path Cost - Indicates if the default path cost is used. The possible values are: - Checked - Default path cost is used. - Unchecked - Path cost is user-defined. • Designated Bridge ID - The bridge ID number that connects the link or shared LAN to the root. • Designated Port ID - The Port ID number on the designated bridge that connects the link or the shared LAN to the root. • Designated Cost - Cost of the path from the link or the shared LAN to the root. • Forward Transitions - Number of times the port changed to the forwarding state. • Remain Hops - Indicates the number of hops remaining to the next destination. Defining MSTP Interface Settings 1 Open the MSTP Interface Settings page. 2 Select an interface. 3 Define the fields. 4 Click Apply Changes. MSTP parameters are defined, and the device is updated. 348 Configuring Switch Information