Routing Engine LEDs and Interface Ports

The area labeled ROUTING ENGINE at the right side of the craft interface contains Routing Engine status LEDs and three ports for connecting the Routing Engine to external devices on which system administrators can issue JUNOS command-line interface (CLI) commands to manage the router.

The green LED labeled OK and red LED labeled FAIL indicate Routing Engine status, as described in Table 7.

Table 7: States for Routing Engine LEDs

Label	Shape	Color	State	Description
OK		Green	On steadily	System Control Board detects presence of the Routing Engine.
			Blinking	Routing Engine is starting up.
FAIL		Red	On steadily	Routing Engine is not operational, or System Control Board does not detect its presence.

The interface ports with the indicated label function as follows:

• MANAGEMENT ETHERNET—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.
• CONSOLE—Connects the Routing Engine to a system console through an RS-232 (EIA-232) serial cable.
• AUXILIARY— Connects the Routing Engine to a laptop, modem, or other auxiliary device through an RS-232 (EIA-232) serial cable.

For information about the pinouts for the connectors, see Cable Connectors and Pinouts.