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If the value of the shared key is different from that of the TACACS+/RADIUS server,
- For RADIUS, it is considered that the RADIUS server is unreachable.
- For TACACS+, it is considered that the TACACS+ server is reachable but the authentication failed.
When resetting any AAA radius / TACACS + configuration, the new setting takes effect only for the subsequent users who log in to the CLI. For example, change the IP of the current TACACS+ server.
Note that：For online users who have already passed AAA Authentication and successfully logged in are not affected by the resetting configurations. If the user logs out and then logs in again, the system will use the new configurations for AAA Authentication.