Allied Telesis AT-9448Ts/XP (Basic Layer 3) - Manual (Page 26)

Chapter 1: Overview
26
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.
Table 6 Stack LEDs
LED State Description
MSTR Off The switch is not part of a stack or is a member
unit of a stack.
Green The switch is the master unit of a 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.