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PowerConnect B-Series FCX Configuration Guide 1185
53-1002266-01
Configuring RADIUS security
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• You can map up to eight RADIUS servers to each port on the Dell PowerConnect device. The
port will authenticate users using only the RADIUS servers to which it is mapped. If there are
no RADIUS servers mapped to a port, it will use the “global” servers for authentication. In
earlier releases, all RADIUS servers are “global” servers and cannot be bound to individual
ports. Refer to “Mapping a RADIUS server to individual ports” on page 1190.
• You can select only one primary authentication method for each type of access to a device (CLI
through Telnet, CLI Privileged EXEC and CONFIG levels). For example, you can select RADIUS as
the primary authentication method for Telnet CLI access, but you cannot also select TACACS+
authentication as the primary method for the same type of access. However, you can configure
backup authentication methods for each access type.
RADIUS configuration procedure
Follow the procedure given below to configure a Dell PowerConnect device for RADIUS.
1. Configure Dell vendor-specific attributes on the RADIUS server. Refer to “Configuring
Dell-specific attributes on the RADIUS server” on page 1185.
2. Identify the RADIUS server to the Dell PowerConnect device. Refer to “Identifying the RADIUS
server to the Dell PowerConnect device” on page 1188.
3. Optionally specify different servers for individual AAA functions. Refer to “Specifying different
servers for individual AAA functions” on page 1188.
4. Optionally configure the RADIUS server as a “port only” server. Refer to “Configuring a RADIUS
server per port” on page 1189.
5. Optionally bind the RADIUS servers to ports on the Dell PowerConnect device. Refer to
“Mapping a RADIUS server to individual ports” on page 1190.
6. Set RADIUS parameters. Refer to “Setting RADIUS parameters” on page 1190.
7. Configure authentication-method lists. Refer to “Configuring authentication-method lists for
RADIUS” on page 1192.
8. Optionally configure RADIUS authorization. Refer to “Configuring RADIUS authorization” on
page 1194.
9. Optionally configure RADIUS accounting. “Configuring RADIUS accounting” on page 1195.
Configuring Dell-specific attributes on the
RADIUS server
NOTE
For all Dell PowerConnect devices, RADIUS Challenge is supported for 802.1x authentication but not
for login authentication.
During the RADIUS authentication process, if a user supplies a valid username and password, the
RADIUS server sends an Access-Accept packet to the Dell PowerConnect device, authenticating the
user. Within the Access-Accept packet are three Dell vendor-specific attributes that indicate:
• The privilege level of the user
• A list of commands
• Whether the user is allowed or denied usage of the commands in the list