Allied Telesis AT-S63 - Manual (Page 490)

Chapter 21: STP and RSTP
490 Section IV: Spanning Tree Protocols
The Configure STP Port Settings menu is shown in Figure 172.
Figure 172. Configure STP Port Settings Menu
7. Adjust the following parameters as needed.
Note
A change to the port priority parameter takes effect immediately. A
change to the port cost value requires you to reset the switch. A new
port cost value is not implemented until the unit is reset.
1 - Port Priority
This parameter is used as a tie breaker when two or more ports are
determined to 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 14, “Port Priority Value
Increments” on page 479.
2 - Port Cost
The spanning tree algorithm uses the cost parameter to decide which
port provides the lowest cost path to the root bridge for that LAN. The
range is 0 to 65,535. The default setting is Automatic Update, which
sets port cost depending on the speed of the port. The Automatic
Update default values are shown in Table 10 on page 478 andTable 11
on page 478.
8. After making changes, type R until you return to the Main Menu. Then
type S to select Save Configuration Changes.
Allied Telesyn Ethernet Switch AT-94xx - AT-S63
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Configure STP Port Settings
Configuring Ports 4-6
1 - Port Priority ..... 128
2 - Port Cost ......... Automatic-Update
R - Return to Previous Menu
Enter your selection?