ZyXEL GS1920 Series User Guide - Page 193
Table 85, Label, Description
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Chapter 24 AAA Figure 144 Advanced Application > AAA > TACACS+ Server Setup The following table describes the labels in this screen. Table 85 Advanced Application > AAA > TACACS+ Server Setup LABEL Authentication Server Mode DESCRIPTION Use this section to configure your TACACS+ authentication settings. This field is only valid if you configure multiple TACACS+ servers. Select index-priority and the Switch tries to authenticate with the first configured TACACS+ server, if the TACACS+ server does not respond then the Switch tries to authenticate with the second TACACS+ server. Timeout Select round-robin to alternate between the TACACS+ servers that it sends authentication requests to. Specify the amount of time in seconds that the Switch waits for an authentication request response from the TACACS+ server. Index IP Address TCP Port Shared Secret If you are using index-priority for your authentication and you are using two TACACS+ servers then the timeout value is divided between the two TACACS+ servers. For example, if you set the timeout value to 30 seconds, then the Switch waits for a response from the first TACACS+ server for 15 seconds and then tries the second TACACS+ server. This is a read-only number representing a TACACS+ server entry. Enter the IP address of an external TACACS+ server in dotted decimal notation. The default port of a TACACS+ server for authentication is 49. You need not change this value unless your network administrator instructs you to do so. Specify a password (up to 32 alphanumeric characters) as the key to be shared between the external TACACS+ server and the Switch. This key is not sent over the network. This key must be the same on the external TACACS+ server and the Switch. GS1920 Series User's Guide 193