Juniper EX4650 Series, Hardware Manual, Page: 29 / 195

Table 6: Chassis Status LEDs on an EX4650 Switch
State and Description Color LED Label
There is no alarm or the switch is halted. Unlit ALM (Alarm)
There is a major alarm.
NOTE: A major hardware fault has occurred, such as a temperature alarm
or power failure, and the switch has halted. Power off the unit by setting the
AC power source outlet to the OFF (O) position, or unplugging the AC power
cords. Correct any voltage or site temperature issues, and allow the switch
to cool down. Power on the unit switch and monitor the power supply and
fan LEDs to help determine where the error is occurring. s the network link
and turns off the ALM LED..)
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.
Amber
•
The switch is powered off or halted. Unlit SYS (System)
Junos OS for EFX Series is loaded on the switch. Green(On steadily)
Indicates a standalone EX4650 switch. Green(On steadily) MST (Master)
The beacon feature is not enabled on the switch. This feature is enabled
using the request chassis beacon command.
Blinking—The beacon feature is enabled.
Unlit ID(Identification)
The beacon feature is enabled on the switch. This feature is enabled using
the request chassis beacon command
Blinking
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.
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