Juniper EX4300

Table 17: Chassis Status LEDs on an EX4300 Switch
State and DescriptionColorLED Label
There is no alarm or the switch is halted.UnlitALM (Alarm)
There is a major alarm.
NOTE: When you connect power to the switch, the Alarm (ALM) LED glows red.
This behavior is normal. Plugging an active Ethernet cable into the management
(MGMT) port on the switch completes the network link and turns off the ALM LED.
(See “Connecting a Device to a Network for Out-of-Band Management” on
page 193.)
Connecting the switch to a dedicated management console instead of a network
does not affect the ALM LED. The LED remains red until the switch is connected
to a network.
Red
There is a minor alarm.
NOTE: The Alarm (ALM) LED glows yellow if you commit a configuration to make
it active on the switch and do not also create a rescue configuration to back it up.
To save the most recently committed configuration as the rescue configuration,
enter the operational mode command request system configuration rescue save.
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.
GreenSYS (System)
In a standalone EX4300 switch:
•
On steadily—The switch is functioning normally as the master.
•
Off—The switch is powered off or is halted.
In a Virtual Chassis configuration:
•
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 line card member in the Virtual Chassis configuration or is
halted.
GreenMST (Master)
A major alarm (red) indicates a critical error condition that requires immediate action.
A minor alarm (yellow) indicates a noncritical condition that requires monitoring or
maintenance. A minor alarm that is left unchecked might cause interruption in service or
performance degradation.
All three LEDs can be lit simultaneously.
Related
Documentation
show chassis lcd•
• Chassis Component Alarm Conditions on EX4300 Switches on page 270
• Checking Active Alarms with the J-Web Interface on page 274
• Understanding Alarm Types and Severity Levels on EX Series Switches on page 269
37Copyright © 2017, Juniper Networks, Inc.
Chapter 2: Chassis Components and Descriptions