Allied Telesis AT-S62 - Manual (Page 505)

AT-S62 Management Software Menus Interface User’s Guide
Section IV: Spanning Tree Protocols 505
6. Adjust the settings as needed. The parameters are explained below.
1 - Port Priority
This parameter functions as a tie breaker when two or more ports have
equal costs to the root bridge. The range is 0 to 240 in increments of
16. The default value is 8 (priority value 128). For a list of the
increments, refer to Table 16, “Port Priority Value Increments” on
page 488.
2 - Port Cost
The spanning tree algorithm uses the cost parameter in deciding which
port provides the lowest cost path to the root bridge for that LAN. The
range is 0 to 20,000,000. The default setting is Automatic Update,
which sets port cost depending on the speed of the port. For the
default values used by Automatic Update, refer Table 14 on page 487
and Table 15 on page 487.
3 - Point-to-Point
This parameter defines whether the port is functioning as a point-to-
point port. For an explanation of this parameter, refer to “Point-to-Point
Ports and Edge Ports” on page 489.
4 - Edge Port
This parameter defines whether the port is functioning as an edge port.
For an explanation of this parameter, refer to “Point-to-Point Ports and
Edge Ports” on page 489.
7. After making changes, type R until you return to the Main Menu. Then
type S to select Save Configuration Changes.
Displaying Port
RSTP Status
The RSTP Port Parameters menu has two selections for displaying a
variety of RSTP port information. The two menu selections are discussed
below.
2 - Display RSTP Port Configuration
This selection displays a menu that contains the current port settings for
the following RSTP parameters:
Port - The port number.
Edge-Port - Whether or not the port is operating 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.
Cost - Port cost of the port. The default is Auto-Update.
Priority - The number used as a tie-breaker when two or more ports have
equal costs to the root bridge.