title: Lwip send udp packets larger than MTU, but my pc can not reassemble them
body: <p>I use lwip-1.4.1 and stm32f407.<br>
  my lwip can send udp packets to pc, but my pc would fail to reassemble when the udp packets are larger than MTU.<br>
  I use wireshark to check these packet context, but the fragmented udp packets from my lwip look as good as normal fragmented udp packets.<br></p>
  
  <p>The following link is the record from wireshark:<br>
  <a href="https://dl.dropboxusercontent.com/u/1321251/test.pcapng" rel="nofollow">https://dl.dropboxusercontent.com/u/1321251/test.pcapng</a></p>
  
  <p>Thanks</p>