After attempting to execute the following API call:
POST https://FQDN/api/v1/logical-routers/<GUID>?action=reallocate
The following error is returned:
VMware NSX
This error is the result of not providing the correct GUID of the T1.
Please use the following methods to acquire the GUID if the T1 router in question:
Navigate: Go to Routing > Tier-1 Gateways
Select Router: Click on the specific T1 router you're interested in.
View Details: The UUID (GUID) is often displayed in the router's overview or details section, or you can check its associated interfaces and ports.
SSH to NSX Manager:
ssh admin@<nsx-manager-ip>
get logical-routers | grep "Tier-1 Router Name"