Juniper Networks MX240 manual Host Subsystem LEDs, Power Supply LEDs

Chapter 2: Hardware Components

Table 11: Alarm LEDs and Alarm Cutoff/Lamp Test Button

Shape	Color	State	Description
	Red	On steadily	Critical alarm LED—Indicates a critical condition
			that can cause the router to stop functioning.
			Possible causes include component removal, failure,
			or overheating.
	Yellow	On steadily	Warning alarm LED—Indicates a serious but nonfatal
			error condition, such as a maintenance alert or a
			significant increase in component temperature.
	–	–	Alarm cutoff/lamp test button—Deactivates red and
			yellow alarms. Causes all LEDs on the craft interface
			to light (for testing) when pressed and held.

Host Subsystem LEDs

Each host subsystem has three LEDs, located on the upper left of the craft interface, that indicate its status. The LEDs labeled RE0 show the status of the Routing Engine in slot 0 and the SCB in slot 0. The LEDs labeled RE1 show the status of the Routing Engine and SCB in slot 1/0Table 12 on page 19 describes the functions of the host subsystem LEDs.

Table 12: Host Subsystem LEDs

Label	Color	State	Description
MASTER	Green	On steadily	Host is functioning as the master.
ONLINE	Green	On steadily	Host is online and is functioning normally.
OFFLINE	Red	On steadily	Host is installed but the Routing Engine is offline.
		Off	Host is not installed.

Power Supply LEDs

Each power supply has two LEDs on the craft interface that indicate its status. The LEDs, labeled 0 through 3, are located on the upper left of the craft interface next to the PEM label. Table 13 on page 19 describes the functions of the power supply LEDs on the craft interface.

Table 13: Power Supply LEDs on the Craft Interface

Label	Color	State	Description
PEM	Green	On steadily	Power supply is functioning normally.
	Red	On steadily	Power supply has failed or power input has failed.

Craft Interface ■ 19