Allied Telesis AT-S39 - Manual (Page 280)

Section III: Web Browser Management
280
To create a port trunk, go to step 4. To delete a port trunk, go to
step 5.
4. To create a port trunk, do the following:
a. Click the ports that will make up the port trunk. A selected port
changes to white. An unselected port is black. A port trunk can
contain 2, 3, or 4 ports.
Once you have selected the ports of the trunk, the following
appears under Trunk Method.
b. Click the desired load distribution method. The default is SA/DA.
c. Click Apply.
d. Configure the ports on the remote switch for port trunking.
The new port trunk is immediately activated on the switch. You
can now connect the data cables to the ports of the trunk on the
switch.
5. To delete a port trunk, click Remove. The port trunk is immediately
deleted from the switch.