Allied Telesis AT-8100 Series - Manual (Page 416)

Chapter 23: Enhanced Stacking
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2. On the switch chosen to be the command switch, activate enhanced
stacking and change its stacking status to command switch. The
commands are ESTACK RUN and ESTACK COMMAND-SWITCH,
both in the Global Configuration mode.
3. On the member switches, activate enhanced stacking. You do not
have to set the enhanced stacking mode on the member switch
because the member mode is the default setting.
4. Create a common port-based or tagged VLAN on the command and
member switches. This step is not necessary if you are using the
Default_VLAN (VID 1) as the common VLAN.
5. Optionally, assign the command switch a management IP address in
the common VLAN.
6. If you plan to remotely manage the stack from management
workstations that are not members of the same subnet as the switch,
assign the command switch a default gateway that defines the first hop
to reaching the subnet of the workstations.
Since an enhanced stack is managed through the command switch,
only that switch must have a default gateway, and only if the remote
management workstations are not members of the same subnet as the
common VLAN of the stack.
7. Connect the devices together using twisted pair or fiber optic ports of
the common VLAN.