Loading JunOS on an EX series switch

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The procedure of loading JunOS on an EX series (or ACX series) switch is exactly the same as Loading JunOS on an MX series router, with one exception:

  • As /mnt is a read-only file-system on EX switches, you have to mount the USB thumb drive under /tmp/usb instead

If you get annoying messages about failing auto-image upgrade, do the following to disable them.

  • Go to configure mode: root> configure
  • Set a root password (otherwise you cannot commit changes): root# set system root-authentication plain-text-password (Use Cisco123 as password)
  • Disable auto-upgrade: root# delete chassis auto-image-upgrade
  • Commit changes and exit: root# commit and-quit
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