TCP/UDP checksum offloading


  1. Posts : 1
    windows xp
       #1

    TCP/UDP checksum offloading


    hello,

    i have a voip application. i tested it on Windows 7.

    when i see the RTP packets with Wireshark, i see that every UDP packet originating from the Windows 7 machine has UDP checksum error, and Wireshark suggests that it might be caused of 'UDP checksum offload'.

    i received a bad/broken voice quality, i've tested in xp and it runs well.

    what i want to ask are.

    is TCP/UDP checksum offloading is enabled by default in Windows 7?
    is there any other way to enable/disable this feature than setting it in the Registry?

    or is this has something to do with the network interface driver? since i read that TCP/UDP checksum offloading let the network interface card to do the TCP/UDP checksum calculation, so that the packets will have a correct TCP/UDP checksum when they're sent on the wire. if that's right, i think that i shouldn't experience a bad/broken voice quality on the other side.


    Thank you.
      My Computer


  2. Posts : 5,642
    Windows 10 Pro (x64)
       #2

    See if updating the driver your your network card fixes the problem.
    But....Registry switches: Using Registry Values to Enable and Disable Task Offloading
      My Computer


 

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