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Topic review - icmp port unreachable error message
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Post subject: icmp port unreachable error message  |  Post Posted: Mon Jul 08, 2013 5:43 am

I am sending UDP packets from one PC to another. I am watching the the whole activity using Wire Shark. I notice that for some time there is smooth transmission of packets from one system to the other. Then suddenly ICMP packets with error 'port unreachable' starts to appear. Then they disappear for some time and there is again smooth transmission of UDP packets. Then these ICMP packets again appear with the same 'port unreachable' error. Then these ICMP packets disappear again and so on. And this continues in a periodic manner.

Please see the wire shark pic as below:

Can anybody please shed some light that what could be the reason for it. and how to avoid it.
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