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Alert Lab Juniper EX on backup image alert

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Juniper EX on backup image alert

happyfunnorm over 6 years ago

It's easier than it seems like it would be, but more cludgey than it needs to be.

Monitor the / drive on your EX and when it is down and no longer responding -- but the device is up -- you're on your backup image.

Why? Juniper mounts a different partition as the / drive on it's different images. Usually they are /dev/da0s1a and /dev/da0s2a, but it doesn't matter which is which. Just check whatever is listed as "mounted on: /" when on its primary image and alert when that volume is unavailable.

0 melmstedt over 6 years ago

Hello gsmith@houseloan.com
If this is still occurring you may have a bigger issue. When you log into your Juniper switch via the CLI is it notifying you of the same ("running off of the backup image")? If it is, you may have a failed CF.
I have seen this once before and it was a bummer to iron out. You can role the dice if this is a lab piece of equipment but if this is core infrastructure I'd recommend replacing the CF with a known good card and then utilizing NCM, or your other management utility, to ensure the images are up and running on both.
Best of luck.
V/r,
Matthew
If this helps to resolve your issue please mark as answered. Thanks!
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0 planglois over 4 years ago in reply to melmstedt

We had an issue where the backup partition was not upgraded to the intended version. There was a power failure at the switch location and when the device came back up it was on on the backup image, with previous bugs we ironed out by upgrading...
Would be nice to poll active and standby image versions to ensure uniformity.
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