Netgear XCM8810 Chassis User Manual - Page 467
Configuring the Shared Secret Password for TACACS+ Communications
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NETGEAR 8800 User Manual Configuring the TACACS+ Client Timeout Value To configure the timeout if a server fails to respond, use the following command: configure tacacs timeout To detect and recover from a TACACS+ server failure when the timeout has expired, the switch makes one authentication attempt before trying the next designated TACACS+ server or reverting to the local database for authentication. In the event that the switch still has IP connectivity to the TACACS+ server, but a TCP session cannot be established, (such as a failed TACACS+ daemon on the server), fail over happens immediately regardless of the configured timeout value. For example, if the timeout value is set for 3 seconds (the default value), it will take 3 seconds to fail over from the primary TACACS+ server to the secondary TACACS+ server. If both the primary and the secondary servers fail or are unavailable, it takes approximately 6 seconds to revert to the local database for authentication. Configuring the Shared Secret Password for TACACS+ Communications The shared secret is a password that is configured on each network device and TACACS+ server. The shared secret is used to verify communication between network devices and the server. To configure the shared secret for client communications with TACACS+ servers, use the following command: configure tacacs [primary | secondary] shared-secret {encrypted} To configure the shared secret for a primary TACACS+ server, specify primary. To configure the shared secret for a secondary TACACS+ server, specify secondary. Do not use the encrypted keyword to set the shared secret. The encrypted keyword prevents the display of the shared secret in the show configuration command output. Enabling and Disabling the TACACS+ Client Service The TACACS+ client service can be enabled or disabled without affecting the client configuration. When the client service is disabled, the client does not communicate with the TACACS+ server, so authentication must take place through the another service such as the local database or a RADIUS server. Note: You cannot use RADIUS and TACACS+ at the same time. To enable the TACACS+ client service, use the following command: enable tacacs To disable the TACACS+ client service, use the following command: disable tacacs Chapter 17. Security | 467
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