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CCNP Security SISAS 300-208 Official Cert Guide by Kevin Redmon, Aaron Woland

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TACACS+ Authentication Messages

When using TACACS+ for authentication, only three types of packets are exchanged between the client (the network device) and the server:

Image START—This packet is used to begin the authentication request between the AAA client and the AAA server.

Image REPLY—Messages sent from the AAA server to the AAA client.

Image CONTINUE—Messages from the AAA client used to respond to the AAA server requests for username and password.

The following ...

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