Juniper Networks M5, M10 manual Alarm LEDs and Lamp Test Button

Craft Interface

For information about the elements on the craft interface, see the following sections:

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Alarm LEDs and Lamp Test Button on page 15

Routing Engine Interface Ports and Status Indicators on page 15

PIC Offline Buttons on page 16

Alarm LEDs and Lamp Test Button

Two large alarm LEDs are located at the top of the craft interface. The circular red LED lights to indicate a critical condition that can result in a system shutdown. The triangular yellow LED lights to indicate a less severe condition that requires monitoring or maintenance. Both LEDs can be lit simultaneously. The button labeled LT (for “lamp test”), located to the left of the alarm LEDs, causes all LEDs on the craft interface to light when pressed and held; use it to test that LEDs are functional.

Table 4 describes the alarm LEDs and lamp test button in more detail.

Table 4: Alarm LEDs and 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.

—— Lamp test button—Causes all LEDs on the craft interface to light (for testing purposes), when pressed and held.

Routing Engine Interface Ports and Status Indicators

Below the alarm LEDs on the craft interface are ports for connecting the Routing Engine to one or more external devices on which system administrators can issue JUNOS command-line interface (CLI) commands to manage the router (see Figure 7). The ports with the indicated label in each set function as follows:

•MGMT—Connects the Routing Engine through an Ethernet connection to a management LAN (or any other device that plugs into an Ethernet connection) for out-of-band management. The port uses an autosensing RJ-45 connector to support both 10- and 100-Mbps connections.

To the left of the port is a link status indicator, which lights to show that a link has been established over the Ethernet connection. To the right of the port is an activity indicator, which flashes when data is being transferred.

Hardware Component Overview 15