TP-Link T1500-28PCT T1500-28PCTTL-SL2428PUN V3 User Guide - Page 347

Configuring Spanning Tree Port Role Port Status LAG MSTP Configurations Displays the role that the port plays in the desired instance. Root Port: Indicates that the port is the root port in the desired instance. It has the lowest path cost from the root bridge to this switch and is used to communicate with the root bridge. Designated Port: Indicates that the port is the designated port in the desired instance. It has the lowest path cost from the root bridge to this physical network segment and is used to forward data for the corresponding network segment. Alternate Port: Indicates that the port is the alternate port in the desired instance. It is the backup of the root port or master port. Backup Port: Indicates that the port is the backup port in the desired instance. It is the backup of the designated port. Master Port: Indicates the port provides the lowest root path cost from the region to the root bridge in CIST. In CIST, each region is regarded as a switch, and the master port is the root port of the corresponding region. Disabled: Indicates that the port is not participating in the spanning tree. Displays the port status. Forwarding: The port receives and sends BPDUs, and forwards user traffic. Learning: The port receives and sends BPDUs. It also receives user traffic, but doesn't forward the traffic. Blocking: The port only receives and sends BPDUs. Disconnected: The port has the spanning tree function enabled but is not connected to any device. Displays the LAG which the port belongs to. User Guide 324