Routing Engine Interface Ports; Routing Engine Boot Sequence; Table 10: Routing Engine Leds - Juniper MX240 Hardware Manual

MX240 Ethernet Services Router Hardware Guide

Table 10: Routing Engine LEDs

Routing Engine Interface Ports

Three Routing Engine ports connect 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 9 on page 14).
The ports with the indicated labels function as follows:
For information about the pinouts for the connectors, see "Cable Connector
Pinouts" on page 185.

Routing Engine Boot Sequence

The Routing Engine boots from the storage media in this order: the USB device (if
present), then the CompactFlash card, then the hard disk, then the LAN.
If the Routing Engines are configured for nonstop routing and graceful switchover,
the backup Routing Engine automatically synchronizes its configuration and state
with the master Routing Engine. Any update to the master Routing Engine state is
replicated on the backup Routing Engine. If the backup Routing Engine assumes
mastership, packet forwarding continues through the router without interruption.
For more information about graceful switchover, see the JUNOS High Availability
Configuration Guide.
16
Host Subsystem
Label Color State
Blue On steadily
MASTER
Green Green
HDD
blinking
Green Blinking
ONLINE
On steadily
Red On steadily
FAIL
—Connects the Routing Engine to a laptop, modem, or other auxiliary device
AUX
through a serial cable with an RJ-45 connector.
CONSOLE —Connects the Routing Engine to a system console through a serial
cable with an RJ-45 connector.
—Connects the Routing Engine through an Ethernet connection to a
ETHERNET
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 10-Mbps or 100-Mbps connections. Two small LEDs on the top of the
port indicate the connection in use: the LED flashes yellow or green for a 10-Mbps
or 100-Mbps connection, and the LED is light green when traffic is passing
through the port.
Description
Routing Engine is the Master.
Hard disk is functioning normally.
Routing Engine is transitioning online.
Routing Engine is functioning normally.
Routing Engine has failed.