Why does HWTACACS authentication fail when the HWTACACS configuration is correct

The HWTACACS server template configuration of the AR is correct. In AAA mode, the HWTACACS authentication configuration and configuration of the remote TACACS server are correct. The possible causes for HWTACACS authentication failures are as follows:
- The client's IP address is not configured on the TACACS server, so the TACACS server does not send authentication packets.
- Different shared keys are configured on the AR and TACACS server.

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