This article shows how we can stage another JUNOS but using only 1 installation file on device.

This will help especially for platforms like QFX5K where space is a constraint.

Unable to copy two installation file on a device.

On a device I have below(only one JUNOS installation file) file present.

{master:0}

root@LAB> file list /var/tmp/jinstall* detail

-rwxrwxrwx 1 root wheel 1618016125 Jul 22 15:01 /var/tmp/jinstall-host-qfx-5e-x86-64-22.2R3-S4.10-secure-signed.tgz*

total files: 1

{master:0}

root@LAB>

{master:0}

root@patcva100> show version

localre:

--------------------------------------------------------------------------

Hostname: LAB

Model: qfx5110-48s-4c

Junos: 22.2R3-S4.10

Now when I do system rollback, it goes to previous version even without the file. Previous version here is 20.4R3-S2.

{master:0}

root@LAB> request system software rollback

localre:

--------------------------------------------------------------------------

Initiating rollback on the Host.

Rolling back to qfx-5e-20.4R3-S2.6.202407241344 image

Rollback staged to image qfx-5e-20.4R3-S2.6.202407241344.

Reboot the system to complete installation!

{master:0}

root@LAB>

At this point if you reboot it would go back to 20.4R3-S2.

Then for upgrade to 22.2R3 we can use usual way.