200 | Security Commands
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radius server host
Configure the RADIUS authentication and accounting server connections.
Syntax
radius server host {auth | acct} ipaddr [port]
no radius server host {auth | acct} ipaddr
Usage
If the auth keyword is used, the command configures the IP address to use to connect to a RADIUS 
authentication server. Up to 3 servers can be configured per RADIUS client. If the maximum number 
of configured servers is reached, the command will fail until one of the servers is removed by 
executing the no form of the command. 
If the optional port parameter is used with the auth keyword, the command will configure the UDP 
port number to use to connect to the configured RADIUS authentication server. In order to configure 
the UDP port number, the IP address must match that of a previously configured RADIUS 
authentication server. The port number must lie between 1 - 65535, with 1812 being the default value.
If the acct keyword is used, the command configures the IP address to use for the RADIUS 
accounting server. Only a single accounting server can be configured. If an accounting server is 
currently configured, it must be removed from the configuration using the no form of the command 
before this command succeeds. If the optional port parameter is used, the command will configure the 
UDP port to use to connect to the RADIUS accounting server. The IP address specified must match 
that of a previously configured accounting server. If a port is already configured for the accounting 
server, then the new port will replace the previously configured value. The port must be a value in the 
range 1 - 65535, with 1813 being the default value.
The no version of this command is used to remove the configured RADIUS authentication server or 
the RADIUS accounting server. If the auth keyword is used, the previously configured RADIUS 
authentication server is removed from the configuration. Similarly, if the acct keyword is used, the 
previously configured RADIUS accounting server is removed from the configuration. The ipaddr 
parameter must match the IP address of the previously configured RADIUS authentication / 
accounting server.
Mode
Global Config 
Parameters
auth
Use this keyword if you want to configure a connection to a RADIUS authentication 
server. See Usage, below.
acct
Use this keyword if you want to configure a connection to a RADIUS accounting 
server. See Usage, below.
ip-addr
Enter the IP address, in dotted decimal format, of the server host.
port
(Optional) Configure the UDP port number to use to connect to the configured 
RADIUS server. See Usage, below. 
Related
Commands
authentication login Define an authentication login list.
show radius Display RADIUS servers.
users defaultlogin Assign the authentication login list to use for non-configured users when 
attempting to log in to the system.