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    SubjectRe: TCP_MD5 and Intel e1000
    Eric Dumazet wrote:
    > On Tue, 22 May 2007 09:33:29 +0200
    > Marc Donner <webmaster@poweraudio.de> wrote:
    >
    >> Hi,
    >>
    >> I have tried to set up quagga with tcp-md5 support from kernel. All seems ok
    >> with a intel e100 NIC, but as i testetd with a intel e1000 NIC the tcp
    >> packets have an invalid md5 digest.
    >> If i run tcpdump on the mashine the packets are generated, it shows on the
    >> outgoing interface invalid md5 digests.
    >> Are there known issues about tcp-md5 and e1000 NICs?
    >>
    >
    > Hi Marc
    >
    > CCed netdev as more appropriate to discuss about network stuff.
    >
    > Would be nice if you sent some tcpdump samples to share with us, and tell us
    > which exact linux version you tried.
    >
    > You could try "ethtool -K tx off", and/or other ethtool -K settings
    >
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    I had this with e1000 NICs and it was just because I had TSO on.

    It is disabled with ethtool as Eric suggests

    Cheers,

    Dunc
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