Allied Telesis AT-S63 - Manual (Page 142)

Chapter 7: Static and LACP Port Trunks
142 Section I: Basic Features
Enter Trunk ID: [1 to 6] ->
5. Enter the ID number of the trunk to be deleted.
The following prompt is displayed:
Are you sure you want to delete this trunk (Y/N) [Yes/No] ->
6. Type Y for yes to delete the port trunk or N for no to cancel this
procedure.
The port trunk is deleted from the switch.
7. After making changes, type R until you return to the Main Menu. Then
type S to select Save Configuration Changes.