Viewing STP Port Details

STP information for every port can be viewed in the STP Port details table.

To view this table, follow the steps given below:

  1. Open the snapshot page of the device.

  2. Under Device Info, click STP Port Details.

The details that are displayed in this table are:

Name Description

Port No.

The port number of the port for which this entry contains Spanning Tree Protocol 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 given by the value of Port No. field.

Port State

The port's current state as defined by application of the Spanning-Tree Protocol. This state controls what action a port takes on reception of a frame. The possible stated of a port are: disabled, blocking, listening, learning, forwarding, and broken.  This object will have a value, disabled, for ports which are disabled as in the Status field.

Status

The enabled/disabled state of the port.

Path Cost

The contribution of this port to the path cost of paths toward the spanning tree root which include this port.

Designated Cost

The path cost of the Designated Port of the segment connected to this port. This value is compared to the Root Path Cost field in received bridge PDUs.

Root Cost

The cost of the path to the root as seen from this bridge.

Designated Bridge

The unique bridge identifier of the bridge recorded as the root in the configuration BPDUs transmitted by the designated bridge for the segment to which the port is attached.

Bridge Port

The port identifier of the port on the designated bridge for this port's segment.

Forward Transitions

The number of times this port has changed from the Learning state to the Forwarding state.

 


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