Allied Telesis AT-S79 - Manual (Page 175)

AT-S79 Management Software User’s Guide
Section I: Using the Menus Interface 175
The Topology Information Menu displays the following information
about the ports:
Trunk
The trunk of which the port is a member.
Link
Whether the link on the port is up or down.
Desig. Root
The designated root bridge is the switch that is directly connected to
the local switch. The MAC address of the designated root bridge is
displayed. In the network topology, the designated bridge is located
between the local switch and the root bridge.
Desig. Cost
The sum of all the root port costs on all bridges, including the switch,
between the switch and the root bridge.
Desig. Bridge
An adjacent bridge to which the root port of the switch is actively
connected.
Desig. Port
The port on the designated bridge that is directly connected to the root
port of the local switch.