This issue is found in the following setup / scenario:
VCF 9.0
We need to execute the following steps to recover from this failure:
For TransportNodeCollection failure on Import:
1.
curl -k -H "Authorization: Bearer $TOKEN" -H "Content-Type: application/json" -X POST -d @importRequest.json https://localhost/v1/sddcs/imports importRequest.json : { "vcenterAddress": "VCENTER_FQDN", "vcenterSsoUsername": "administrator_SSO_USERl", "vcenterSsoPassword": "administrator_SSO_PASSWORD", "vcenterRootSshPassword": "VCENTER_ROOT_PASSWORD", "skipEsxThumbprintValidation": true, "vcenterSslThumbprint": "[VCENTER_SSL_THUMBPRINT]", "domainName": "[WORKLOAD_DOMAIN_NAME]", <------------same domain name as of initial import "nsxtSpec": { "useExistingDeployment": true, "vipFqdn": "NSX_VIP_FQDN", "nsxtAuditPassword": "AUDIT_USER_PASSWORD", "rootNsxtManagerPassword": "ROOT_USER_PASSWORD", "nsxtAdminPassword": "ADMIN_USER_PASSWORD", "enableEdgeClusterSync": false, "sslThumbprint": "NSX_SSL_THUMBPRINT", "nsxtManagers": [] }}
For TNC failure on Convert: