Check the features in this network.

def check(self, radl):
        """Check the features in this network."""

        SIMPLE_FEATURES = {
            "outbound": (str, ["YES", "NO"]),
            "outports": (str, check_outports_format),
            "provider_id": (str, None)
        }
        self.check_simple(SIMPLE_FEATURES, radl)