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EMCA 使用Lwip协议，数据流过不了二层、三层交换机，设备直连或经过傻瓜式交换机可以通讯
请大侠指点
你好，你有查看过TI提供的相关例程吗？
http://software-dl.ti.com/hercules/hercules_docs/latest/hercules/Examples/Examples.html#lightweight-ip-lwip-demo
