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I got a Juniper EX2200 switch which is unable to boot, prior to a corrupted flash. The JTAC support is expired and i tried almost everything to get it working again. I read an article about "Running JunOS directly from an USB stick", but there was no explanation/instructions on how to do this.

Is it possible to do this and how?

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Yes, you can boot JUNOS from a USB drive, and an EX2200 will work.

Booting an EX Series Switch Using a Software Package Stored on a USB Flash Drive

Follow the documentation and it should work fine. Chances are your flash isn't permanently corrupt so you can reinstall JUNOS and get everything back in working order.

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  • I tried to follow the instructions in the following link, but it didn't fix the problem. I'm still getting error messages and it just continues to boot loop.
    – Indigo
    Jul 16, 2015 at 18:29
  • Can you paste what you're seeing?
    – Jordan Head
    Jul 16, 2015 at 19:00
  • Never mind, just tried the loader> install --format --external file:/// again. I'm able to access Junos now. But after 2 reboots it went on again, but this time i fixed it again with the above command and were able to update the boot loader.
    – Indigo
    Jul 16, 2015 at 20:12

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