Users Guide

Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.8(1.0) Introduced on the Z9100-ON.
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.
9.4.(0.0) Introduced on the S-Series and Z-Series.
Usage Information
You can use this command to associate a group of TACACS servers with a VRF and source interface. You can
congure the source interface only with the VRF attribute and source interface is optional with the VRF attributes.
If VRF is not congured on the TACACS group, then the group is considered to be on the default VRF.
RADIUS groups and VRFs have one-to-one mapping. If a VRF is congured with one RADIUS group, then you
cannot use the same VRF with another RADIUS group. When the VRF is removed, then the corresponding
RADIUS group is also removed automatically.
Example
Dell(conf)# tacacs-server group group1
Dell(conf-tacacs-group)# tacacs-server vrf vrf1 source-interface
gigabitethernet 1/36
Dell(conf)# tacacs-server group group2
Dell(conf-tacacs-group)# tacacs-server vrf default
Port Authentication (802.1X) Commands
An authentication server must authenticate a client connected to an 802.1X switch port. Until the authentication, only Extensible
Authentication Protocol over LAN (EAPOL) trac is allowed through the port to which a client is connected. After authentication is
successful, normal trac passes through the port.
Dell Networking OS supports RADIUS and Active Directory environments using 802.1X Port Authentication.
Important Points to Remember
Dell Networking OS limits network access for certain users by using VLAN assignments. 802.1X with VLAN assignment has these
characteristics when congured on the switch and the RADIUS server.
• 802.1X is supported on Dell Networking OS.
• 802.1X is not supported on the LAG or the channel members of a LAG.
• If no VLAN is supplied by the RADIUS server or if 802.1X authorization is disabled, the port is congured in its access VLAN after
successful authentication.
• If 802.1X authorization is enabled but the VLAN information from the RADIUS server is not valid, the port returns to the Unauthorized
state and remains in the congured access VLAN. This prevents ports from appearing unexpectedly in an inappropriate VLAN due to a
conguration error. Conguration errors create an entry in Syslog.
• If 802.1X authorization is enabled and all information from the RADIUS server is valid, the port is placed in the specied VLAN after
authentication.
• If port security is enabled on an 802.1X port with VLAN assignment, the port is placed in the RADIUS server assigned VLAN.
Security
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