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On Thu, 22 Mar 2001, Radu-Adrian Feurdean wrote:
>
> Hi,
>
> We had some problems that showed up to be caused by TCP options. Briefly:
>
> Director:
> ipvs: 0.2.5, 0.2.6 (tested with both)
> kernel: 2.4.2
>
> Real servers:
> Kernels: 2.4.0-0.99.23smp, 2.2.16
>
> Symptom:
> TCP connections are not esatblished. The 3rd packet from the 3-way handshake
> is rejected by Linux-based clients. Exactly the same configuration has been
> used for tests, on a different network, and it didn't show up these symptoms.
>
> The symptom diappears if all the following sysctl options are set to 0:
> net.ipv4.tcp_timestamps, net.ipv4.tcp_sack, net.ipv4.tcp_window_scaling
>
>
> Has anyone had similar symptoms ? Is there any reasonable explanation for
> this ?
>
I don't have any clue on it. The 3rd packet should be from the client to
the server? which side do you set those sysctl options? Would you give
tcpdump results on client, load balancer and server?
Regards,
Wensong
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