Allied Telesis AT-S63 - Manual (Page 590)

Chapter 24: Multiple Spanning Tree Protocol
590 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. The possible settings are:
ˆ Auto-detect - Port cost is automatically set depending on the speed
of the port.
ˆ 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.