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Re: [lvs-users] problem with directors and XEN

To: "LinuxVirtualServer.org users mailing list." <lvs-users@xxxxxxxxxxxxxxxxxxxxxx>
Subject: Re: [lvs-users] problem with directors and XEN
From: Sebastian Vieira <sebvieira@xxxxxxxxx>
Date: Tue, 27 Jan 2009 09:51:04 +0100
On Fri, Dec 19, 2008 at 1:50 PM, Michael Schwartzkopff
<misch@xxxxxxxxxxx> wrote:
> Is it perhaps a problem with the tcp checksum offload problem? See:
> http://www.austintek.com/LVS/LVS-HOWTO/HOWTO/LVS-HOWTO.virtualised_realservers.html

To come back on this issue. I have noticed that you only need to
disable tcp checksum offloading on the realservers' interface.
Disabling it on the XEN/director's interface makes no difference.
Also, the problem only occurs with LVS-NAT. LVS-DR is unaffected.
Maybe demasquerading somehow affects some packets in such a way that
XEN drops them?

I have a running test environment at the moment so if anyone needs
more testing done, let me know how i can help.


Sebastian

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