Mutual Authentication is required when Media Gateway is operating in the Edge mode and is connected to Avaya SBC.
Requiring mutual authentication sets a condition where both CM and the gateway are required to exchange and validate each other’s identity certificates.
The Mutual Authentication field on the Communication Manager Media Gateway form supports the following keyword options:
Avaya recommends administrators to select the Required option because it provides a higher degree of security. If Optional is selected, and no identity certificate is loaded in the gateway’s H248 application directory; CM establishes a TLS connection without the gateway having to offer an identity certificate. For more information, see Administering Avaya Aura® Communication Manager.