Management Port Leds In Ex4500 Switches - Juniper EX4500 Hardware Manual

Table 8: Chassis Status LEDs in an EX4500 Switch
LED Label
ALM (Alarm)
SYS (System)
MST (Primary)
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.
All three LEDs can be lit simultaneously.

Management Port LEDs in EX4500 Switches

The management port on the front panel of an EX4500 switch has two LEDs that indicate link/activity
and port status (see Figure 12 on page
Color
Unlit
Red
Amber
Green
Green
48).
State and Description
There is no alarm or the switch is halted.
There is a major alarm.
There is a minor alarm.
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.
In a standalone EX4500 switch:
On steadily—The switch is functioning normally.
Off—The switch is powered off or is halted.
In a Virtual chassis configuration:
On steadily—The switch is the primary 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 or is halted.
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