Configuring Security
Configuring RADIUS Parameters
Cisco Small Business 200 1.1 Series Smart Switch Administration Guide  233
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Configuring RADIUS Parameters
Remote Authorization Dial-In User Service (RADIUS) servers provide a centralized 
802.1X or MAC-based network access control. The switch is a RADIUS client that 
can use a RADIUS server to provide centralized security. 
For the RADIUS server to grant access to the web-based switch configuration 
utility, the RADIUS server must return cisco-avpair = shell:priv-lvl=15.
To set the RADIUS server parameters:
STEP 1 Click Security > RADIUS. The RADIUS page displays.
STEP  2 Enter the default RADIUS parameters. Values entered in the Default Parameters 
are applied to all servers. If a value is not entered for a specific server (in the Add 
RADIUS Server page) the switch uses the values in these fields.
• IP Version—Displays the supported IP version: IPv6 and/or IPv4 subnet.
• Retries—Enter the number of transmitted requests that are sent to the 
RADIUS server before a failure is considered to have occurred. 
• Timeout for Reply—Enter the number of seconds that the switch waits for 
an answer from the RADIUS server before retrying the query, or switching to 
the next server. 
• Dead Time—Enter the number of minutes that elapse before a non-
responsive RADIUS server is bypassed for service requests. If the value is 0, 
the server is not bypassed. 
• Key String—Enter the default key string used for authenticating and 
encrypting between the switch and the RADIUS server. This key must match 
the key configured on the RADIUS server. A key string is used to encrypt 
communications by using MD5. A key configured for an individual RADIUS 
server has precedence over the default key that is used if there is no key 
provided for an individual server. 
STEP  3 Click Apply. The RADIUS settings for the switch are updated in the Running 
Configuration file.