Allied Telesis Switch AT-9000/28 Manual de usuario Pagina 165

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AlliedWare Plus Version 2.1.2 Management Software Web Browser User’s Guide
165
forwards the information to the servers when managers log on. The
following steps illustrate the authentication process that occurs between
the switch and an authentication server when a manager logs on:
1. The switch uses its RADIUS or TACACS+ client to transmit the user
name and password to an authentication server on the network.
2. The server checks to see if the user name and password are valid.
3. If the combination is valid, the authentication server notifies the switch,
which completes the login process, allowing the manager access to its
management software.
4. If the user name and password are invalid, the authentication protocol
server notifies the switch, which cancels the login.
Configuring
TACACS+ and
RADIUS
You configure the authentication method and the authentication server, or
servers, with the following procedures:
“Selecting the Authentication Method” on page 166
“Configuring the Authentication Server” on page 168
The order in which you configure the authentication method and the
authentication server does not matter. However, you must configure both
of these procedures to have an authentication server that is actively
attached to your switch.
You can configure up to three servers each for the RADIUS and
TACACS+ features. However, only one authentication method and one
server is active at a time.
If you configure three authentication servers, the switch queries the
servers in the order in which they are listed in its table, starting with 1. As a
result, the server that you assign a priority of 1 is used first to authenticate
the switch. If that server goes down, then the server assigned a priority of
2 is used to authenticate the switch. If the server with a priority 2 goes
down, then the server with a priority of 3 is used to authenticate the switch.
If the server with a priority of 3 goes down, there is no authentication on
the switch.
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