Allied Telesis AT-S63 - Manual (Page 338)

Chapter 20: Multiple Spanning Tree Protocol
338 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 139.
Figure 139. 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 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 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. The possible settings are:
Auto-detect - Port cost is automatically set depending on the speed of
the port.
Default values - 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.