Routing Engine Boot Sequence; Re-A-1800 Routing Engine Leds; Figure 14: Usb Memory Device In An Routing Engine - Juniper M120 Hardware Manual

Routing Engine Boot Sequence

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RE-A-1800 Routing Engine LEDs

Copyright © 2018, Juniper Networks, Inc.

Figure 14: USB Memory Device in an Routing Engine

The Routing Engine boots from the storage media in this order: the USB device, then the
CompactFlash card (if present), then the two solid state drives (SSD) and then the LAN.
The device from which the router boots is called the primary boot device, and the other
device is the alternate boot device.
NOTE: If the router boots from an alternate boot device, a yellow alarm lights
the LED on the router's craft interface.
M120 Routing Engine Description on page 22
M120 Host Subsystem Description on page 21
Taking the M120 Host Subsystem Offline on page 267
Supported Routing Engines by Router on page 33
Each Routing Engine has four LEDs that indicate its status. The LEDs, labeled
, , and
STORAGE ONLINE OK/FAIL
Engine. Table 10 on page 28
Chapter 5: Host Subsystem Components and Descriptions
, are located directly on the faceplate of the Routing
describes the functions of the Routing Engine LEDs.
MASTER ,
27