Allied Telesis AT-S63 - Manual (Page 118)

Chapter 6: Static Port Trunks
118 Section I: Basic Operations
6. Type M to select Modify Trunk.
The modifications to the port trunk are activated on the switch.
7. To permanently save your change, return to the Main Menu and type S
to select Save Configuration Changes.
8. Reconnect the cables to the ports of the trunk on the switch.
The modified port trunk is ready for network operations.