Allied Telesis x600-48Ts/XP - Manual (Page 28)

Chapter 1: Overview
28
Stack LEDs
The STACK LEDs reflect the status of the two Stack ports on the
AT-StackXG Stacking Module. These LEDs remain off if the module is not
installed. See Table 7 for a description of the STACK LEDs.
Table 7. STACK LEDs
LED State Description
MSTR Off The switch is not part of a stack or is a member
unit of the stack.
Green The switch is the master unit of the stack.
1 L/A Off Stack Port 1 has not established a link to a
stacking port on another AT-StackXG Stacking
Module.
Green Stack Port 1 has established a link to a
stacking port on another AT-StackXG Stacking
Module.
Flashing
Green Stack Port 1 has established a link to a
stacking port on another AT-StackXG Stacking
Module and is sending or receiving packet
traffic.
2 L/A Off Stack Port 2 has not established a link to a
stacking port on another AT-StackXG Stacking
Module.
Green Stack Port 2 has established a link to a
stacking port on another AT-StackXG Stacking
Module.
Flashing
Green Stack Port 2 has established a link to a
stacking port on another AT-StackXG Stacking
Module and is sending or receiving packet
traffic.
PRES Off The expansion slot for the AT-StackXG
Stacking Module is empty.
Green The AT-StackXG Stacking Module is installed
in the switch.