def METHOD_NAME(self):
    db = Db()
    runner = CliRunner()
    # add
    result = runner.invoke(
        config.config.commands["nvgre-tunnel"].commands["add"],
        ["tunnel_1", "--src-ip", INVALID_VALUE], obj=db
    )
    logger.debug("\n" + result.output)
    logger.debug(result.exit_code)
    assert result.exit_code == ERROR
    # verify
    self.verify_output(db, runner, "nvgre-tunnel", assert_show_output.show_nvgre_tunnel_empty)