def tearDown(self):
        super(SimpleInstanceTest, self).tearDown()
        CONF.network_label_regex = self.orig_conf
        CONF.ip_start = None
def add_vpp_config(self):
        self._test.vapi.ip_punt_redirect(punt=self.encode(), is_add=True)
        self._test.registry.register(self, self._test.logger)