If your system is configured with a RADIUS server you can display the RADIUS server information.

Note
no RADIUS server configured
Switch:1>show radius-server
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Radius Server Entries
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SECURE SECURE SECURE SECURE SECURE SECURE ACCT ACCT
NAME USEDBY SECRET PORT PRIO RETRY TIMEOUT ENABLED ENABLED MODE INSTANCE PROFILE LOG-LEVEL OCSP PORT ENABLED
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192.0.2.14 cli ****** 1812 10 1 8 true true tls 0 radsecp error false 1813 true
192.0.2.15 cli ****** 1812 10 1 8 true false tls -1 default error false 1813 true