Brocade TurboIron 24X Series Configuration Guide - Manual (Page 124)

90 Brocade TurboIron 24X Series Configuration Guide
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Configuring TACACS/TACACS+ security
Identifying the TACACS/TACACS+ servers
To use TACACS/TACACS+ servers to authenticate access to a device, you must identify the servers
to the device.
For example, to identify three TACACS/TACACS+ servers, enter commands such as the following.
TurboIron(config)#tacacs-server host 10.94.6.161
TurboIron(config)#tacacs-server host 10.94.6.191
TurboIron(config)#tacacs-server host 10.94.6.122
Syntax: tacacs-server host <ip-addr> | <ipv6-addr> | <hostname> [auth-port <number>]
The <ip-addr>|<ipv6-addr>|<hostname> parameter specifies the IP address or host name of the
server. You can enter up to eight tacacs-server host commands to specify up to eight different
servers.
NOTE
To specify the server's host name instead of its IP address, you must first identify a DNS server using
the ip dns server-address <ip-addr> command at the global CONFIG level.
If you add multiple TACACS/TACACS+ authentication servers to the device, the device tries to reach
them in the order you add them. For example, if you add three servers in the following order, the
software tries the servers in the same order.
1. 10.94.6.161
2. 10.94.6.191
3. 10.94.6.122
You can remove a TACACS/TACACS+ server by entering no followed by the tacacs-server command.
For example, to remove 10.94.6.161, enter the following command.
TurboIron(config)#no tacacs-server host 10.94.6.161
NOTE
If you erase a tacacs-server command (by entering “no” followed by the command), make sure you
also erase the aaa commands that specify TACACS/TACACS+ as an authentication method. (Refer
to
“Configuring authentication-method lists for TACACS/TACACS+” on page 92.) Otherwise, when you
exit from the CONFIG mode or from a Telnet session, the system continues to believe it is
TACACS/TACACS+ enabled and you will not be able to access the system.
The auth-port parameter specifies the UDP (for TACACS) or TCP (for TACACS+) port number of the
authentication port on the server. The default port number is 49.
Specifying different servers for individual AAA functions
In a TACACS+ configuration, you can designate a server to handle a specific AAA task. For example,
you can designate one TACACS+ server to handle authorization and another TACACS+ server to
handle accounting. You can set the TACACS+ key for each server.
To specify different TACACS+ servers for authentication, authorization, and accounting, enter the
command such as following.