The authentication-algorithm command specifies an authentication algorithm for an Internet Key Exchange (IKE) proposal.
SHA2-256 is the default authentication algorithm for an IKE proposal.
authentication-algorithm aes-xcbc-mac-96
Uses the AES-XCBC-MAC-96 authentication algorithm. Only IKEv2 supports AES-XCBC-MAC-96.
IKE proposal view
2: Configuration level
This command is available to aid upgrade compatibility. It can only be run during the configuration restoration phase of the upgrade.