Juniper EX4200 Series User Manual

Chassis Status LEDs in EX4200 Switches
The front panel of an EX4200 switch has three LEDs on the far right side of the panel,
next to the LCD panel (see Figure 10 on page 20).
Figure 10: Chassis Status LEDs in an EX4200 Switch
Table 6 on page 20 describes the chassis status LEDs in an EX4200 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 lcd.
Table 6: Chassis Status LEDs in an EX4200 Switch
State and DescriptionColorLED Label
There is no alarm.UnlitALM (Alarm)
There is a major alarm.Red
There is a minor alarm.Amber
•
On steadily—Junos OS for EX Series switches has been
loaded on the switch.
•
Blinking—The switch is booting.
GreenSYS (System)
•
On steadily—The switch is the master in the Virtual Chassis
configuration.
•
Blinking—The switch is the backup in the Virtual Chassis
configuration.
•
Off—The switch is a linecard member in the Virtual Chassis
configuration.
GreenMST (Master)
A major alarm (red) indicates a critical error condition that requires immediate action.
A minor alarm (amber) indicates a noncritical condition that requires monitoring or
maintenance. A minor alarm that is left unchecked might cause interruption in service or
performance degradation.
NOTE: Theamber glow of the AlarmLED thatindicates a minor alarmcloselyresembles
the red glow that indicates a major alarm.
All three LEDs can be lit simultaneously.
Related Topics Front Panel of an EX4200 Switch on page 9•
Copyright © 2010, Juniper Networks, Inc.20
Complete Hardware Guide for EX3200 and EX4200 Ethernet Switches

Juniper EX4200 Series Specifications

General

Brand	Juniper
Model	EX4200 Series
Category	Switch
Language	English