'Excute task'

def work(self):

    self.get_evpn_instance_info()
    self.process_input_params()
    self.check_params()
    self.get_existing()
    self.get_proposed()
    self.conf_exist = self.judge_if_config_exist()
    self.config_evnp_bd()
    self.get_end_state()
    self.show_result()
