# MST Port Status

Port > Configure > Spanning Tree > Multiple Spanning Tree (MST)

This dialog box provides MST information for a specific trunk port, as well as MST information for the bridge port present in this system. The following data is displayed:

- Module (moduleIndex)

- Port (portIndex)

- Admin Link Type (stpxMSTPortAdminLinkType)

- Operational Link Type (stpxMSTPortOperLinkType)

- Port Status (stpxMSTPortStatus)

- Preferred MST Instances (0..15) (stpxPreferredMSTInstancesMap)

Do one of the following:

- Click Redetect Protocol to initiate protocol migration on this port.

- Click OK to continue.

- Click Apply to save the changes in the dialog box.

- Click Cancel to close the dialog box.

- Click Refresh to update the contents of the dialog box.

- Click Print to print the contents of the dialog box.

- Click Help to access online help.

Module (moduleIndex)

Module number for this port.

Port (portIndex)

Numerical identifier assigned to this port.

Admin Link Type (stpxMSTPortAdminLinkType)

Indicates the administrative link type configuration of a bridge port:

- pointToPoint—the port is administratively configured to be connected to a point-to-point link

- shared—the port is administratively configured to be connected to a shared medium

- auto—the administrative configuration of the port's link type depends on the port's link duplex mode. If the port link is in full-duplex mode, the administrative link type is "pointTopoint". If the port link is in half-duplex mode, the administrative link type is "shared".

Note: This object is instantiated only when the value of stpxSpanningTreeType for this device is set to "MST". In addition, this field is not displayed for voice ports.

Operational Link Type (stpxMSTPortOperLinkType)

Indicates the operational link type of a bridge port:

- pointToPoint—the port is operationally connected to a point-to-point link

- shared—the port is operationally connected to a shared medium

- other—none of the above

Note: This object is instantiated only when the value of stpxSpanningTreeType for this device is set to "MST".

Port Status (stpxMSTPortStatus)

Indicates the operational status of this port.

Preferred MST Instances (0..15) (stpxPreferredMSTInstancesMap)

List of preferred MST instances for the trunk port. Valid values range from 0 to 15.

Note: Values can be entered as a single digit or as a range (for example, 1-3). In addition, this field is not displayed for voice ports.