Oracle's internal IMS service authenticates admin users and grants users a role. A role controls the access the fabric. The IMS service is the Oracle Fabric OS local system, which is always present. Adding admin users and roles is performed through the GUI.
The internal IMS ensures that you can always log in to the chassis using a local account if connections to an external service are lost. After you apply the configuration, the IMS service is completely transparent to the operators.
These topics describe how to manage users and roles.