SMC Networks SMC6224M manual 137

SPANNING TREE ALGORITHM CONFIGURATION

•Designated Port – The port priority and number of the port on the designated bridging device through which this switch must communicate with the root of the Spanning Tree.

•Oper Link Type – The operational point-to-point status of the LAN segment attached to this interface. This parameter is determined by manual configuration or by auto-detection, as described for Admin Link Type in STA Port Configuration on page 3-140.

•Oper Edge Port – This parameter is initialized to the setting for Admin Edge Port in STA Port Configuration on page 3-140(i.e., true or false), but will be set to false if a BPDU is received, indicating that another bridge is attached to this port.

•Port Role – Roles are assigned according to whether the port is part of the active topology connecting the bridge to the root bridge (i.e., root port), connecting a LAN through the bridge to the root bridge (i.e., designated port), or is an alternate or backup port that may provide connectivity if other bridges, bridge ports, or LANs fail or are removed. The role is set to disabled (i.e., disabled port) if a port has no role within the spanning tree.

Alternate port receives more useful BPDUs from another bridge and is therefore not selected as the designated

port.R

R: Root Port

A:Alternate Port

D:Designated Port

B:Backup Port

R

AD B

x

3-137