Allied Telesis AT-9000 Series - Manual (Page 178)

Chapter 16: Setting RADIUS and TACACS+ Clients
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2. Enter the following fields as needed:
 IP Address— IP address of a RADIUS server on the network. The
IP address must be in the following IPv4 format: xxx.xxx.xxx.xxx.
 Authentication Port— UDP destination port for RADIUS
authentication requests. If you select 0, the server is not used for
authentication. The default UDP port for authentication is 1812.
 Accounting Port— UDP destination port for RADIUS accounting
requests. If you select 0, the server is not used for accounting. The
default UDP port for accounting is 1813.
 Key— Encryption key for RADIUS communications between the
switch and RADIUS server. The key must match the encryption
key used by the RADIUS server. The maximum length is 40
characters. Special characters are allowed, but spaces are not
permitted.
3. Click Apply.
4. Click SAVE.