Allied Telesis 8100S Series - Manual (Page 52)

Chapter 1: Overview
52
Figure 18. Stack ID LED
The 8100L Series switches do not support stacking, but they have stack
ID LEDs and can be assigned ID numbers because they have the same
management software as the 8100S Series switches. Given that you
cannot stack 8100L Series switches, the correct ID number for these units
is always “0.” Refer to Chapter 5, “Powering On the Switch” on page 85 for
the procedure on how to change the ID number of the switch.
Stack ID
LED