Allied Telesis AT-S81 - Manual (Page 157)

AT-S81 Management Software User’s Guide
Section II: Menus Interface 157
Desig. Root
The designated root bridge to which the switch’s root port is actively
connected.
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 root bridge to which the root port of the switch is actively
connected.