Allied Telesis AT-S63 - Manual (Page 170)

Chapter 14: STP and RSTP
170 Section II: Advanced Features
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 Auto-
detect, which sets port cost depending on the speed of the port. If
you select Auto-Detect, the management software assigns a value
of 100 if the port is operating at 10 Mbps, 10 for 100 Mbps, and 4
for one gigabit.
9. After you have configured the parameters, click Apply.
10. To permanently save the change, return to the General tab on the
System page and click Save Changes.
For more information about what the Save Changes button does,
refer to ”Saving Your Parameter Changes” on page 36.
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.
Displaying the
STP Settings
To display the STP settings, perform the following procedure:
1. From the Home page, select Monitoring.
The Monitoring System page is displayed with the General tab
selected by default, as shown in Figure 6 on page 44.
2. From the Monitoring menu, select the Layer 2 option.
The Layer 2 page is displayed with the MAC Address tab displayed
by default, as shown in Figure 25 on page 94.
3. Select the Spanning Tree tab.
4 64 12 192
5 80 13 208
6 96 14 224
7 112 15 240
Table 6. Port Priority Value Increments (Continued)
Increment
Bridge
Priority
Increment
Bridge
Priority