交换机上实现动态vlan的注册，虽然标准协议上有garp，但gvrp的应用毕竟是少，此源码是已经开发在实际的交换机上的了。-Dynamic vlan switch registration, although there are standard protocols garp, but after all, is the application of gvrp less, the source is in practice have been developed on a switch.