Allied Telesis AT-S63 - Manual (Page 466)

Chapter 22: Multiple Spanning Tree Protocol
466 Section V: Spanning Tree Protocols
The Display MSTP Port Configuration menu displays a table that
contains the following columns of information:
Port
The port number.
Edge-Port
Whether or not the port is functioning as an edge port. The possible
settings are Yes and No.
Point-to-Point
Whether or not the port is functioning as a point-to-point port. The
possible settings are Yes, No, and Auto-Detect.
External or Internal Port Cost
External Port Cost
The port cost of the port if the port is connected to a bridge which is a
member of another MSTP region or is running STP or RSTP.
Internal Port Cost
The port cost of the port if the port is connected to a bridge which is
part of the same MSTP region. If the setting is Auto Update, the port
cost is set automatically depending on the speed of the port. Default
values are 2,000,000 for 10 Mbps ports, 200,000 for a 100 Mbps ports,
and 20,000 for one gigabit ports.
Priority
This parameter is used as a tie breaker when two or more ports are
determined to have equal costs to the regional root bridge.