The VxRail REST API uses standard HTTP status code conventions to communicate the outcome of programmatic management commands. When a REST API request is submitted to the VxRail Manager appliance, the request undergoes a strict authorization verification step against the vCenter Server Single Sign- On (SSO) and Role-Based Access Control (RBAC) frameworks to ensure the calling entity possesses the required privileges.
If the user account successfully completes authentication (proving identity) but lacks the specific administrative permissions within vCenter to execute that particular infrastructure task-such as adding a node or altering cluster network properties-the VxRail API gateway intercepts the operation and returns an HTTP status code 403 Forbidden. This response signifies that while the server understands who the user is, the account does not possess the structural clearance or functional rights to execute the requested payload. In contrast, an HTTP 401 Unauthorized status is returned if the request fails authentication completely due to invalid or missing credentials. Status code 500 signifies a general internal server error, making 403 the definitive response for privilege omissions.
References: Dell VxRail Deploy Study Guide; VxRail REST API Security Architecture; HTTP Status Codes and Error Handling.