Dell PowerConnect M6220 User's Guide - Page 323

- Designated - Indicates the port or LAG through which the designated switch is attached to the LAN. - Alternate - Provides an alternate path to the root switch from the interface. - Backup - Provides a backup path to the designated LAN. 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. • Priority - Defines the interface priority for the specified instance. The priority range is 0-240 in steps of 16. The default value is 128. • Path Cost (0-200000000) - Indicates the port contribution to the Spanning Tree instance. The range should always be 0-200,000,000. The default value is determined by the port's speed. The default value is: - Port Channel-20,000 - 1000 mbps (giga)-20,000 - 100 mbps-200,000 - 10 mbps-2,000,000 • Designated Bridge ID - Displays the bridge ID number that connects the link or shared LAN to the root. • Designated Port ID - Displays the port ID number on the designated bridge that connects the link or the shared LAN to the root. • Designated Cost - Displays cost of the path from the link or the shared LAN to the root. Assigning MSTP Interface Settings 1. Open the MSTP Interface Settings page. 2. Select an Instance ID from the drop-down menu. 3. Specify Port or LAG, then select the interface from the related drop-down menu. 4. Specify Interface Priority and Path Cost. 5. Click Apply Changes. The interface settings are saved, and the device is updated. Displaying the MSTP Interface Settings Table 1. Open the MSTP Settings page. 2. Click Show All. The MSTP Interface Table displays. Configuring Switching Information 321