Juniper M120 - Figure 13: RE-A-1800 X2 Routing Engine

•
USB port—Provides a removable media interface through which you can install the
Junos OS manually. See Figure 14 on page 27. Junos supports USB version 1.0.
•
CompactFlash card—Provides primary storage for software images, configuration files,
and microcode. The disk is a fixed compact flash and is inaccessible from outside the
router.
•
SSD—Provides storage for log files, memory dumps, and rebooting the system if the
CompactFlash card fails.
•
LED—Indicates disk activity. It does not necessarily indicate routing-related activity.
NOTE: The LEDs that report host module status (including Routing Engine
status) are on the craft interface rather than the Routing Engine faceplate.
•
Storage LED—Indicates disk activity for the solid state disk drive.
•
Interfaces for out-of-band management access—Provide information about
Routing Engine status to devices (console, laptop, or terminal server) that can be
attached to access ports located on the craft interface.
Each Routing Engine has one 10/100-Mbps Ethernet port for connecting to a
management network, and two asynchronous serial ports—one for connecting to a
console and one for connecting to a modem or other auxiliary device.
•
EEPROM—Stores the serial number of the Routing Engine.
•
Reset button—Reboots the Routing Engine when pressed.
•
Offline button—Takes the Routing Engine offline when pressed.
•
Extractor clips—Control the locking system that secures the Routing Engine.
Figure 13: RE-A-1800x2 Routing Engine
g006041
USB
port
Reset
button
Online
LED
Storage
LED
SSD
slot 2
SSD
slot 1
Online/Offline
button
Extractor
clip
Extractor
clip
NOTE: For specific information about Routing Engine components (for
example, the amount of DRAM), issue the show chassis routing-engine
command.
Copyright © 2018, Juniper Networks, Inc.26
M120 Multiservice Edge Router Hardware Guide