Juniper EX4550, Hardware Manual, Page: 50 / 330

Table 10: Virtual Chassis Module LED
Description State LED
The Virtual Chassis module is functioning normally. Green
ST
One of the following:
• The Virtual Chassis module is not functioning normally.
•
The switch has been powered off.
Unlit
The Virtual Chassis module has two captive screws on the faceplate that secure the
module to the switch chassis. To remove or replace the Virtual Chassis module, follow
the instructions in
“Removing a Virtual Chassis Module from an EX4550 Switch” on
page 226 .
Related
Documentation
Field-Replaceable Units in EX4550 Switches on page 18
•
•
Installing a Virtual Chassis Module in an EX4550 Switch on page 225
•
EX4550 Switches Hardware Overview on page 3
Chassis Status LEDs in EX4550 Switches
The front panel of an EX4550 switch has three chassis status LEDs (labeled ALM , SYS ,
and MST ) on the far right side of the panel, next to the Menu and Enter buttons (see
Figure 16 on page 28 ).
Figure 16: Chassis Status LEDs in an EX4550 Switch
Table 11 on page 28 describes the chassis status LEDs in an EX4550 switch, their colors
and states, and the status they indicate. You can view the colors of the three LEDs
remotely through the CLI by issuing the operational mode command
show chassis led
.
Table 11: Chassis Status LEDs in an EX4550 Switch
State and Description Color LED Label
There is no alarm or the switch is halted. Unlit
ALM
(Alarm)
There is a major alarm. Red
There is a minor alarm. Yellow
• On steadily—Junos OS for EX Series switches has been loaded on the switch.
• Blinking—The switch is booting.
• Off—The switch is powered off or is halted.
Green SYS (System)
Copyright © 2015, Juniper Networks, Inc. 28
EX4550 Switch Hardware Guide