Supported Protocols in the IMS AAA Server
The IMS AAA Server implements the following protocols for transaction processing and server administration.
For details about the transaction processing protocols, see Table 6, and for details about the server administration protocols, see Table 7.
The Diameter protocol implementation supports advanced queue management, such as event-based management of incoming and outgoing queue sizes, and re-queuing of aging requests at full transaction rate, including very high transaction rates.
- RADIUS client—In proxy scenarios, the IMS AAA Server has to act as a RADIUS client.
- CoA/DM client—Change of Authorization and Disconnect Messages. These components are for RADIUS dynamic authorization requests.
- RADIUS server—Implementation includes NAS client configuration for processing and servicing incoming requests.
The Diameter protocol requires that IPsec be used to secure its transport, unless TLS is used between the transport (TCP, SCTP) and Diameter itself. The product does not support TLS and relies on the IPsec implementation provided by the host operating system.
The IMS AAA Server only supports the TLS protocol on the connection between the IMS AAA Server and the Administrator. The IMS AAA Server only uses standard, non-anonymous cipher suites and requires a server certificate to secure the administrative connection.
The SNMP implementation enables the mapping of the native XML-based configuration space to an SNMP MIB. This implementation supports alerts, and is based on an external SNMP agent that accesses the IMS AAA Server agent.