Troubleshooting Software Installation; Recovering From A Failed Software Upgrade On An Ex Series Switch - Juniper JUNOS OS 10.3 - SOFTWARE Manual

CHAPTER 8

Troubleshooting Software Installation

Troubleshooting Software Installation

Recovering from a Failed Software Upgrade on an EX Series Switch

Problem
Solution
Copyright © 2010, Juniper Networks, Inc.
Troubleshooting Software Installation on page 99
Recovering from a Failed Software Upgrade on an EX Series Switch on page 99
Rebooting from the Inactive Partition on page 100
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 Junos OS 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 an EX
Series Switch Using a Software Package Stored on a USB Flash Drive" on page 88 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:
format —Use this option to wipe the installation media before installing the software
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>
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