Client
clause usually checks the value of
any Message-Authenticator
attribute in incoming EAP
or other requests, if there is any
Message-Authenticator
present. An incorrect
authenticator causes the request to be ignored.
The optional
RequireMessageAuthenticator
flag causes the Client to
require a correct Message-Authenticator
attribute to
be present in all incoming requests that support
Message-Authenticator
attribute. Most of the request
types support Message-Authenticator
.
Accounting-Request is an exception.