The radius-server attribute message-authenticator access-request command carries the Message-Authenticator attribute in RADIUS authentication packets sent by the device.
The undo radius-server attribute message-authenticator access-request command cancels the Message-Authenticator attribute from RADIUS authentication packets sent by the device.
By default, RADIUS authentication packets do not carry the Message-Authenticator attribute.
radius-server attribute message-authenticator access-request
undo radius-server attribute message-authenticator access-request
The Message-Authenticator attribute is used to identify and verify authentication packets to prevent invalid packets.