SMC Networks SMC8624/48T manual 127, Rules defining port status are

SPANNING TREE ALGORITHM CONFIGURATION

The rules defining port status are:

-A port on a network segment with no other STA compliant bridging device is always forwarding.

-If two ports of a switch are connected to the same segment and there is no other STA device attached to this segment, the port with the smaller ID forwards packets and the other is discarding.

-All ports are discarding when the switch is booted, then some of them change state to learning, and then to forwarding.

•Forward Transitions – The number of times this port has transitioned from the Learning state to the Forwarding state.

•Designated Cost – The cost for a packet to travel from this port to the root in the current Spanning Tree configuration. The slower the media, the higher the cost.

•Designated Bridge – The bridge priority and MAC address of the device through which this port must communicate to reach the root of the Spanning Tree.

•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 3-130.

•Oper Edge Port – This parameter is initialized to the setting for Admin Edge Port in STA Port Configuration on page 3-130(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.

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