3Com Switch 7750 Configuration Guide

514 CHAPTER 49: AAA & RADIUS & HWTACACS CONFIGURATION
Figure 131 Network diagram for a typical HWTACACS application
Basic message exchange procedure in HWTACACS
For example, use HWTACACS to implement authentication, authorization, and
accounting for a telnet user. Figure 132 illustrates the basic message exchange
procedure:
Figure 132 The AAA implementation procedure for a telnet user
Host
HWTACACS client
HWTACACS server
HWTACACS serve
r
TACACS serve
r
User
TACACS client
Requests to log in
Authentication start request
Authentication response, requesting username
Requests username
Enters username
Authentication continuous message,
carrying username
Authentication response, requesting password
Requests password
Enters password
Authentication success response
Authorization request
Authorization success response
Allows user to log in
Accounting start request
Accounting start response
Exits the switch
Accounting stop request
Accounting stop response
Authentication continuous message,
carrying password