Installing Junos OS Using a USB Storage Device on ACX Series Routers
To install the Junos OS image on ACX Series routers using a USB storage device, you
must have access to the USB port physically and you must also have console access.
Perform the following steps to install the Junos OS image:
1. Insert the USB storage device that has a valid installation image into the USB port.
2. Reboot the router by either pressing the power button on the chassis or switching off
and turning on the power button behind the Routing Engine, or by entering the request
system reboot command from the CLI. The system LED starts blinking in green.
On the console, a message is displayed stating that your flash memory device (NAND
Flash device) will be formatted and you will lose all the data. You are prompted to
confirm the formatting of the flash memory device.
3. Press y to confirm and proceed with the formatting process. The flash memory device
is formatted and the image is installed on both the partitions.
After the installation is completed, a message is displayed on the console prompting
you to eject the USB storage device and to press Enter to reboot the device.
4. After you remove the USB port and press Enter, the reboot begins. After the router is
rebooted, the new Junos OS version is loaded and functional. The LED glows steadily
in green.
NOTE: If an installation error occurs, the LEDs turn red. You must have console
access to the router to troubleshoot an installation error.
Related
Documentation
Dual-Root Partitioning ACX Series Routers Overview on page 48•
• Understanding How the Primary Junos OS Image with Dual-Root Partitioning Recovers
on the ACX Series Router on page 49
• Junos OS Release 12.2 or Later Upgrades with Dual-Root Partitioning on ACX Series
Routers on page 51
• Installing Junos OS Upgrades from a Remote Server on ACX Series Routers on page 52
• Example: Installing Junos OS and Configuring a Dual-Root Partition on ACX Series
Routers Using the CLI on page 53
Installing Junos OS Upgrades from a Remote Server on ACX Series Routers
You can use the CLI to install Junos OS packages that are downloaded with FTP or HTTP
from the specified location on internal media, such as the NAND Flash device.
Copyright © 2017, Juniper Networks, Inc.52
ACX Series Universal Access Router Configuration Guide
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