H3C S7500 Series Operation Manual page 532

Operation Manual – AAA & RADIUS & HWTACACS & EAD
H3C S7500 Series Ethernet Switches
Figure 1-6 The AAA implementation procedure for a telnet user
The basic message exchange procedure is as follows:
1) A user requests access to the switch; the TACACS client sends an authentication
start request packet to TACACS server upon receipt of the request.
2) The TACACS server sends back an authentication response requesting for the
username; the TACACS client asks the user for the username upon receipt of the
response.
3) The TACACS client sends an authentication continuance packet carrying the
username after receiving the username from the user.
4) The TACACS server sends back an authentication response, requesting for the
password. Upon receipt of the response, the TACACS client requests the user for
the login password.
5) After receiving the login password, the TACACS client sends an authentication
continuance packet carrying the login password to the TACACS server.
6) The TACACS server sends back an authentication response indicating that the
user has passed the authentication.
Chapter 1 AAA & RADIUS & HWTACACS
1-10
Configuration