[CentOS] Xen and bonding on Centos 5.2

[Dirk H. Schulz]

Francesco,

--On 10. August 2008 20:18:28 +0200 Francesco Camisa 
<francesco.camisa at policlinicosanmarco.it> wrote:

> If you are using kernel 92.1.6 it's because apparently there is a bug. I
> haven't tried 92.1.10 to check if it has been solved. On 5.2 stock kernel
> on the other hand I have no problems.

The server that has no problem with bonding at all has been using 92.1.6 
for weeks now - the server having the problem is still running 53 - I try 
updating it to 92.1.10 now.

Dirk

>
> Francesco
> Policlinico San Marco
> Italy
>
> ----- Original Message -----
> From: "Dirk H. Schulz" <dirk.schulz at kinzesberg.de>
> To: "CentOS mailing list" <centos at centos.org>
> Sent: Friday, 8 August, 2008 5:33:09 PM GMT +01:00 Amsterdam / Berlin /
> Bern / Rome / Stockholm / Vienna Subject: [CentOS] Xen and bonding on
> Centos 5.2
>
> Hi folks,
>
> I am stuck with a weird phenomenon.
>
> I have set up two servers as xen servers with bonded interfaces (mode 1).
> The bond interface works fine on both servers as long as xen is not used.
>
> When using xen's network-bridge script (with netdev=bond0), one server
> works fine without problems, and the other starts upping and downing the
> slave interfaces of the bond in a very fast manner (several runs per
> second). Both configurations are identical, the only difference is:
> - the working server has tg3 nic drivers
> - the dysfunctional server has e100 nic drivers.
>
> Does it really depend on the nic driver if bonding works? And why does it
> not work in xen, but work fine without xen? What can I do to analyse the
> problem?
>
> I know I could ask this on the xen list, but I fear that this is a
> redhat/centos specific phenomenon.
>
> Any hint or help is appreciated.
>
> Dirk
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Dirk H. Schulz
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Technik vom Feinsten - und das nötige Tuning