The original always thought is the code problem, changed and changed. is only the local collection.
Later check all kinds of information or cases, see some people say virtual machine can not receive. Brainwave, put the server in the virtual machine. Ok. Virtual machine is win7x64 host is win8x64.
Also find whether WIN8 system causes.
http://blog.csdn.net/lixiang987654321/article/details/41697533
In the company's recent project, the device search for the use of UDP broadcast search, the situation is that some of the machine can normally receive broadcast packets, some machines do not receive the broadcast packet, some of the machine cannot send broadcast packets, after n days of inquiry, The results found amazing secret: the virtual Machine network card causes the broadcast packet can not send out or receive the problem!!! The above results are for the reference of the great gods only!
Disable the virtual network card to enable it, and discover that it is possible.
Painful life, the final solution needs to be supplemented, at present, the first VMnet1 disabled.
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VB.net broadcast only this function receiving Socket client cannot receive Win8