Troubleshooting Software Installation; Recovering From A Failed Software Upgrade On An Ex Series Switch - Juniper JUNOS OS 10.4 - FOR EX REV 1 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 105
Recovering from a Failed Software Upgrade on an EX Series Switch on page 105
Rebooting from the Inactive Partition on page 106
Freeing Up Disk Space for Software Installation on page 107
If the 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 the Junos
OS.
If there is already a Junos OS image on the system, you can either install the new Junos
OS package in a separate partition and have both Junos OS images 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 94 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
displays, you are prompted
prompt displays.
loader>
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