Role — Indicates the port role assigned by the STP algorithm in order to provide to STP paths. The possible field values are:

Root — Provides the lowest cost path to forward packets to root device.

Designated — Indicates the port or LAG via which the designated device is attached to the LAN.

Alternate — Provides an alternate path to the root device from the root interface.

Backup — Provides a backup path to the designated port path toward the Spanning Tree leaves. Backup ports occur only when two ports are connected in a loop by a point-to-point link. Backup ports also occur when a LAN has two or more connections connected to a shared segment.

Disabled — Indicates the port is not participating in the Spanning Tree.

Interface Priority — Defines the interface priority for specified instance. The default value is 128.

Path Cost — Indicates the port contribution to the Spanning Tree instance. The possible range is 1-200,000,000.

Default Path Cost — Indicates if the default path cost is used. The possible values are:

Checked — Default path cost is used.

Unchecked — Path cost is user-defined.

Designated Bridge ID — The bridge ID number that connects the link or shared LAN to the root.

Designated Port ID — The Port ID number on the designated bridge that connects the link or the shared LAN to the root.

Designated Cost — Cost of the path from the link or the shared LAN to the root.

Forward Transitions — Number of times the port changed to the forwarding state.

Remain Hops — Indicates the number of hops remaining to the next destination.

Defining MSTP Interface Settings

1Open the MSTP Interface Settings page.

2Select an interface.

3Define the fields.

4Click Apply Changes.

MSTP parameters are defined, and the device is updated.

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Configuring Switch Information

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Dell 3548 manual Configuring Switch Information