Allied Telesis AT-8000GS/POE User Manual

Chapter 1: Overview

18

The stacking LED indications are described in the following table:

You can select a particular status mode for a RJ-45 Port on either the AT-
8000GS/24 Gigabit Ethernet Switch or the AT-8000GS/48 Gigabit 
Ethernet Switch by using the Mode Select switch button on the front panel. 
(The AT-8000GS/24POE Gigabit Ethernet Switch does not have a Mode 
select switch.) 

The MODE LEDs indicate which mode is actively displayed on each 
corresponding RJ-45 port Mode LED. For example, if the mode selected is 
"COL", then the LED on each port indicates the collision status of that port. 
See “RJ-45 Port LEDs on AT-8000GS/24 & AT-8000GS/48” on page 19 
for the location of the RJ-45 MODE LED on each port. 

Table 4  Stacking LED Indications

All LEDs off The device is operating as a standalone 

switch.

S1

Green

The device is in stacking mode, and is 
either the master or backup of the stack, 
which is determined by the master 
election algorithm.

S2

Green

The device is master-enabled, and is 
either the master or backup of the stack, 
which is determined by the master 
election algorithm.

S3

Green

The device is operating as Stack Member 
3 in the stack.

S4

Green 

The device is operating as Stack Member 
4 in the stack.

S5

Green

The device is operating as Stack Member 
5 in the stack.

S6

Green

The device is operating as Stack Member 
6 in the stack.