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Displaying STP port data

To display STP port data:

  1. From the Device Manager menu bar, choose VLAN > STP.
  2. The STP dialog box opens with the Globals tab displayed.
  3. Click the STP Ports tab.
  4. The STP Ports tab opens.

The following table describes the fields in the STP Ports tab.


Field Description
Port
The port number for this entry containing STP management information.
Priority
The value of the priority field which is contained in the first (in network byte order) octet of the (2 octet long) port ID. The other octet of the port ID is determined by the value of the port. The range here is from 0 to 255.
PortState
The port's current state as defined by STP. This state controls what action a port takes when it receives a frame. If the bridge detects a malfunctioning port, it designates that port as broken. Similarly, ports that are disabled are designated as disabled.
Status
Indicates the port's current status, enabled or disabled.
Path Cost
The port's contribution to the path costs towards the spanning tree root including this port. 802.1D-1990 recommends that the default value of this parameter be in inverse proportion to the speed of the attached LAN
Root
The unique bridge identifier recorded as the root in the configuration BPDUs transmitted by the designated bridge for the segment to which the port is attached.
Root Cost
The path cost of the designated segment port connected to this port. This value is compared to the root path cost field in received bridge PDUs.
Bridge
The bridge identifier which this port considers as the designated bridge for this port's segment.
Bridge Port
On the designated bridge, the port identifier for this port's segment.
Learn-Forward Transitions
The number of times this port has transitioned from the learning state to the forwarding state.

  1. You may configure the STP status for each port, or alternatively use Edit > Port > STP to configure the port status as explained in "Enabling and disabling STP."

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