M120 Routing Engine Interface Ports And Status Indicators; Table 10: Routing Engine Leds - Juniper M120 Hardware Manual

M120 Multiservice Edge Router Hardware Guide
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M120 Routing Engine Interface Ports and Status Indicators

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Table 10: Routing Engine LEDs

Label Color
Blue
MASTER
Green
STORAGE
Green
ONLINE
Red
OK/FAIL
M320 LED Overview
M320 RE-A-1800 Routing Engine Description
Maintaining the M320 Host Subsystem
To the right of the alarm relay contact on the craft interface are two sets of ports that
connect the Routing Engines to one or more external devices on which system
administrators can issue Junos OS command-line interface (CLI) commands to manage
the router (see Figure 6 on page
Engine in the left Routing Engine slot (
Routing Engine ( ) in the right Routing Engine slot.
RE1
The ports with the indicated label in each set function as follows:
AUX —Connects the Routing Engine to a laptop, modem, or other auxiliary device
through a cable with an RJ-45 connector.
—Connects the Routing Engine to a system console through a cable with an
CONSOLE
RJ-45 connector.
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. Two small LEDs on the bottom of the port indicate
the connection in use: the LED lights yellow or green for a 10-Mbps or 100-Mbps
connection, and the LED lights green when traffic is passing through the port.
RJ-45 Connector Pinouts for the M120 Routing Engine ETHERNET Port on page 106
RJ-45 Connector Pinouts for the Routing Engine AUX and CONSOLE Ports on page 106
RJ-45 Connector Pinouts for the External Clock Ports on page 107
State Description
On steadily Routing Engine is the Master.
Blinking Indicates activity on the SSD or Compact Flash.
Blinking Routing Engine is transitioning online.
On steadily Routing Engine is functioning normally.
On steadily Routing Engine has failed.
11). The set of ports in the left connects to the Routing
) and the set on the right connects to the
REO
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