On Tue, 2 Oct 2007, Herbert Xu wrote:

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> On Mon, Sep 24, 2007 at 11:44:19AM +0200, Krzysztof Oledzki wrote:
>>
>> So, with DR mode, packet goes by the lo device (with bad checksum) and
>> then get redirected outside. Unfortunately, when it leaves host it has b=
ad
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>> checksum, too. :(
>
> Did you check this by taking a tcpdump on an external host?
Yes.

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> Doing a local tcpdump doesn't work as tcpdump won't show the
> correct checksum if checksum offload is enabled.
Indeed, I'm aware about this.

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> If it's really sending a bogus checksum then it's a bug in
> LVS.

I'm not sure if we should call it a bug. LVS does not support such=20
configuration by default - it requires kernel patching. However, it worked=
=20
with older kernels so that's why I asked if it is possible to force full=20
TCP/UDP checksum calculation?

Thank you.

Best regards,

 =09=09=09=09Krzysztof Ol=EAdzki