Juniper M7i Hardware Manual page 45

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Copyright © 2019, Juniper Networks, Inc.
Solid-state Disk (SSD)—Provides secondary storage for log files and memory dumps,
and can reboot the system if the CompactFlash card fails. SSD is front-pluggable and
hot-swappable.
Interface ports—The
AUX
devices. Each Routing Engine has one 10/100/1000-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.
Online/Offline button—Takes the Routing Engine online or offline when pressed.
Real-time clock—Provides real-time integrated clock with batter backup for data
retention.
Extractor handle—Used for inserting and extracting the Routing Engine.
Captive screws—Secure the Routing Engine in place.
Four LEDs—A green LED labeled
labeled FAIL , and a green LED labeled
NOTE: For specific information about Routing Engine components (for
example, the capacity of the SSD), issue the
command.
The router is shipped with the Junos OS preinstalled on the Routing Engine. There are
three copies of software:
One copy on the CompactFlash card in the Routing Engine.
One copy on the SSD in the Routing Engine.
One copy on a USB flash drive that can be inserted into the slot on the Routing Engine
faceplate.
The Routing Engine boots from the storage media in this order: the USB device (if present),
then the CompactFlash card, then the SSD, then the LAN. Normally, the router boots
from the copy of the software on the CompactFlash card.
M7i Routing Engine 1800 LEDs on page 22
Replacing the M7i Routing Engine on page 141
Replacing the SSD on an RE-B-1800 Routing Engine on page 143
Chapter 5: Host Subsystem Components and Description
, , and ports provide access to management
CONSOLE MGMT
, a blue LED labeled
STORAGE
ONLINE indicate Routing Engine status.
, a red LED
MASTER
show chassis routing-engine
21