Deregister a Discovery Sensor for OT from the Discovery Console for OT that is no longer available on your system.
Before you begin
Role required: admin
Procedure
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In the Console, navigate to the Appliances page.
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From the list, select the Sensor that you want to deregister.
The Sensor record opens.
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In the record, select the Actions icon.
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Select Deregister from the menu.
When the Sensor is associated to a Site, you get a prompt.

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If you select Continue in this window, you receive a prompt:
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If you still intend to deregister the Sensor, select the Deregister button in this window.
Result
The Sensor is deregistered, and the Sensor is reset to the default network configuration, which is the DHCP with the link-local fallback.