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I have a large network consisting of around 300 layer 2 switches and 5 ITNs. We have TACACS+ installed and have been using it for authentication for years. Just recently, our TACACS+ has begun getting the following error:
"%SEC_LOGIN-4-LOGIN_FAILED: ...
The Prime user account authenticates successfully on every network device. All other individual TACACS+ accounts only succeed on about 20% of the network devices, even though they all have the same TACACS+ configuration.
