3Com 3CBLSG24 User Guide - Page 129
Path Cost, Priority, RSTP Link Type, Designated Bridge ID, Forward Transitions, Point to Point, Shared
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Viewing Spanning Tree 129 ■ Path Cost - Indicates the port contribution to the root path cost. The path cost is adjusted to a higher or lower value, and is used to forward traffic when a path is re-routed. ■ Priority - Priority value of the port. The priority value influences the port choice when a bridge has two ports connected in a loop. The priority range is between 0 -240. The priority value is determined in increments of 16. ■ RSTP Link Type - Indicates whether a Point-to-Point link is established, or if the device is permitted to establish a Point-to-Point link. The possible field values are: ■ Auto - Enables the device to establish automatically point-to-point link. ■ Point to Point - Indicates if a point-to-point link is currently established on the port. Ports set to Full Duplex modes are considered Point-to-Point port links. ■ Shared - Enables the device to establish a shared link. ■ Designated Bridge ID - Indicates the bridge priority and the MAC Address of the designated bridge. ■ Designated Port ID - Indicates the selected port priority and interface. ■ Designated Cost - Indicates the cost of the port participating in the STP topology. Ports with a lower cost are less likely to be blocked if STP detects loops. ■ Forward Transitions - Indicates the number of times the port has changed from Forwarding state to Blocking state.