Service Manual

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-6.2.1.0 Introduced on the E-Series.
Usage Information
To congure any number of RADIUS server hosts for each server host that is congured, use this command. Dell
Networking OS searches for the RADIUS hosts in the order they are congured in the software.
The global default values for the timeout, retransmit, and key optional parameters are applied, unless those
values are specied in the radius-server host or other commands. To return to the global default values, if
you congure the
timeout, retransmit, or key values, include those keywords when using the no radius-
server host command syntax.
You can use duplicate host names or IP addresses among RADIUS groups. However, you cannot use duplicate host
names or IP addresses within the same RADIUS group. If a VRF is not congured on the RADIUS group, then
servers congured in the group are considered to be on the default VRF. RADIUS servers that are congured in the
CONFIGURATION mode are also considered to be on the default VRF.
You must congure the RADIUS group explicitly with the aaa radius group command in order for the AAA
servers to use the group of RADIUS servers. The 802.1x servers use the group of RADIUS servers based on the
VRF where the 802.1x request is received. As a result, it is possible that both globally congured RADIUS servers as
well as the group-congured RADIUS servers (without VRF or default VRF) are used for processing the 802.1x
requests that are received at the default VRF. The order in which the RADIUS servers are tried depends on the
order in which the RADIUS servers are congured.
Example
Dell(conf)# radius-server group group1
Dell(conf-radius-group)# radius-server host 1.1.1.1 key secret
Dell(conf-radius-group)# no radius-server host 1.1.1.1
Dell(conf-radius-group)#
Related Commands
• login authentication — sets the database to be checked when a user logs in.
• radius-server key — sets an authentication key for RADIUS communications.
• radius-server retransmit — sets the number of times the RADIUS server attempts to send information.
• radius-server timeout — sets the time interval before the RADIUS server times out.
1408 Security