Users Guide

Command History
This guide is platform-specic. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Introduced on the S6000–ON.
9.2(1.0) Introduced on the Z9500.
9.0.2.0 Introduced on the S6000.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.4.1.0 Added support for IPv6.
8.3.7.0 Introduced on the S4810.
7.7.1.0 Authentication key length increased to 42 characters.
7.6.1.0 Introduced on the S-Series.
7.5.1.0 Introduced on the C-Series.
pre-6.2.1.1 Introduced on the E-Series.
Usage Information
To list multiple TACACS+ servers to be used by the aaa authentication login command, congure
this command multiple times.
If you are not conguring the switch as a TACACS+ server, you do not need to congure the port,
timeout and key optional parameters. If you do not congure a key, the key assigned in the tacacs-
server key command is used.
You can use duplicate host names or IP addresses among TACACS groups. However, you cannot use
duplicate host names or IP addresses within the same TACACS group.
If a VRF is not congured on the TACACS group, then servers congured in the group are considered to be
on the default VRF. TACACS servers that are congured in the CONFIGURATION mode are also considered
to be on the default VRF.
For AAA servers to use a group of TACACS servers, you must explicitly congure the group using the aaa
tacacs group group-name command. The order in which the TACACS servers are tried depends on
the order in which they are congured.
Example
Dell(conf)#tacacs-server group group1
Dell(conf-tacacs-group)#tacacs-server host 1.1.1.1 key secret
Dell(conf-tacacs-group)#no tacacs-server host 1.1.1.1
Related Commands
aaa authentication login — species the login authentication method.
tacacs-server key — congures a TACACS+ key for the TACACS server.
Security
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