This parameter defines the Diameter attributes, which are added to a request object in addition with OriginHost and OriginRealm. The request object is created when a Diameter request message is received. The request object is then sent to the handler with the correct application AuthBy for this request.

The request object contains reference to the incoming Diameter request. The chosen Diameter application adds the reference to the Diameter answer. <AuthBy DiaRelay> relays the request to the correct peer and processes the answer, which is returned from the relay peer.