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Controls whether STP is enabled on this switch port.
Path Cost :
Controls the path cost incurred by the port. The Auto setting will set the path cost
as appropriate by the physical link speed, using the 802.1D recommended values.
Using the Specific setting, a user-defined value can be entered. The path cost is
used when establishing the active topology of the network. Lower path cost ports
are chosen as forwarding ports in favor of higher path cost ports. Valid values are in
the range 1 to 200000000.
Priority :
Controls the port priority. This can be used to control priority of ports having
identical port cost. (See above).
operEdge (state flag) :
Operational flag describing whether the port is connecting directly to edge devices.
(No Bridges attached). Transition to the forwarding state is faster for edge ports
(having operEdge true) than for other ports.The value of this flag is based on
AdminEdge and AutoEdge fields. This flag is displayed as Edge in
Monitor->Spanning Tree -> STP Detailed Bridge Status.
AdminEdge :
Controls whether the operEdge flag should start as set or cleared. (The initial
operEdge state when a port is initialized).
AutoEdge :
Controls whether the bridge should enable automatic edge detection on the bridge
port. This allows operEdge to be derived from whether BPDU's are received on the
port or not.
Restricted Role :
If enabled, causes the port not to be selected as Root Port for the CIST or any MSTI,
even if it has the best spanning tree priority vector. Such a port will be selected as
an Alternate Port after the Root Port has been selected. If set, it can cause lack of
spanning tree connectivity. It can be set by a network administrator to prevent
bridges external to a core region of the network influence the spanning tree active
topology, possibly because those bridges are not under the full control of the
administrator. This feature is also known as Root Guard.
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