Allied Telesis AT-S63 - Manual (Page 308)

Chapter 19: Multiple Spanning Tree Protocol
308 Section IV: Spanning Tree Protocols
6. In the CIST/MSTI field, specify the MSTI where the port is a member
through its VLAN assignment. You can specify only one value. The
default is 0 for CIST.
7. Click Settings or Status.
The MSTP Settings - Port (s) page is shown in Figure 126.
Figure 126. MSTP Settings - Port(s) Page
The MSTP Settings page displays a table that contains the following
columns of information:
Port
The port number.
Edge-Port
Whether the port is functioning as an edge port. The possible settings
are Yes and No.
Point-to-Point
Whether the port is functioning as a point-to-point port. The possible
settings are Yes, No, and Auto-Detect.
External 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 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.