Deregister a transit gateway using AWS Network Manager
Deregister a transit gateway from a global network using either the Network Manager console or using the CLI. Once deregistered, you can re-register this transit gateway with the same global network or with a different global network.
To deregister a transit gateway
Access the Network Manager console at https://console.aws.amazon.com/networkmanager/home/
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Under Connectivity, choose Global Networks.
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On the Global networks page, choose the global network ID.
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In the navigation pane, choose Transit gateways.
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Select your transit gateway, and choose Deregister.
To deregister a transit gateway using the AWS CLI
Use the deregister-transit-gateway command.