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RedNectar
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There is a Global ACI option (SYSTEM > SYSTEM SETTINGS >> Fabric Wide Setting | Enforce Domain Validation) that forces ACI to check that an EPG is linked to a Domain. The Cisco Application Centric Infrastructure Design Guide White Paper recommends that this option be turned on, but it is a once-only option.  Once it is turned on, you can't turn it off.

And that includes turning it off by restoring a snapshot that was taken before the option was turned on.

So the point of this post is to warn anyone who turns this option on (and I recommend that you do), you should do so as the very first configuration action you take with a new Fabric, BEFORE you take any snapshots.

If you try to restore a snopshot taken before the option was enabled you will receive the following error:

Failed to apply tree: Asking for domain validation is a one time operation. No further changes allowed

Domain Validation Error.jpg

RedNectar
aka Chris Welsh

 

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