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CHAPTER 8
Troubleshooting Software Installation
Troubleshooting Software Installation
Recovering from a Failed Software Upgrade on a J-EX Series Switch
Problem
Solution
Troubleshooting Software Installation on page 91
Recovering from a Failed Software Upgrade on a J-EX Series Switch on page 91
Rebooting from the Inactive Partition on page 92
If Junos OS loads but the CLI is not working for any reason, or if the switch has no software
installed, you can use this recovery installation procedure to install Junos OS.
If there is already a Junos OS image on the system, you can install the new Junos OS
package in a separate partition and both images will remain on the system, or you can
wipe the disk clean before the new installation proceeds.
If there is no Junos OS image on the system, follow the instructions in "Booting a J-EX
Series Switch Using a Software Package Stored on a USB Flash Drive" on page 79 to get
an image on the system and boot the switch.
To perform a recovery installation:
Power on the switch. The loader script starts.
1.
After the message
Loading /boot/defaults/loader.conf
with:
Hit [Enter] to boot immediately, or space bar for command prompt.
Press the space bar to enter the manual loader. The
2.
Enter the following command:
3.
loader> install [– –format] [– –external] source
where:
—Use this option to wipe the installation media before installing the software
format
package. If you do not include this option, the system installs the new Junos OS
package in a different partition from that of the most recently installed Junos OS
package.
displays, you are prompted
prompt displays.
loader>
91
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Troubleshooting
