Allied Telesis AT-S60 - Manual (Page 276)

Chapter 16: Multiple Spanning Tree
Section II: Advanced Features 276
5. Type Y for yes or N for no.
The switch reboots and if you select Yes, the selected spanning
tree protocol becomes the active protocol on the switch. You can
now configure the parameters of the selected spanning tree
protocol.
Unlike other management procedures with the AT-S60 software,
this procedure does not require you to return to the Main Menu to
save your changes. The change to the active spanning tree
protocol is automatically saved before the switch reboots.
Note
Steps 6, 7, and 8 apply only if you did not enable the spanning tree
when you selected it. These steps enable or disable the spanning
tree protocol.
6. To enable or disable the active spanning tree, type 1 to select
Spanning Tree Status.
7. Type E to enable spanning tree or D to disable it. The default is
enabled.
8. After making changes, type R until you return to the Main Menu. Then
type S to select Save Configuration Changes.