Allied Telesis AT-9448Ts/XP (Basic Layer 3) - Manual (Page 56)

Chapter 3: Preparing the Switches
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3. The new module ID number does not take affect until the switch is
reset. Reset the unit with this command:
restart reboot
4. Wait for the switch to reset and afterwards reestablish the
management session by logging in again.
5. Enter the following command again to verify the switch’s stack ID
assignment:
show stack
6. Verify that the Stack Mode is Static and the Stack ID is 1. If the values
are correct, go to the next step. Otherwise, repeat the procedure
starting with step 2.
7. Power off the switch.
Repeat the procedures in this chapter on the other switches of the stack.
Afterwards, go to the next chapter for instructions on how to cable and
power on the stack.