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Re: [Xen-users] Network down when upgrade to xen 4.0.1 on centOS 5.5

To: Wenda Ni <wonda.ni@xxxxxxxxx>
Subject: Re: [Xen-users] Network down when upgrade to xen 4.0.1 on centOS 5.5
From: Pasi Kärkkäinen <pasik@xxxxxx>
Date: Mon, 21 Feb 2011 12:15:27 +0200
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On Sat, Feb 19, 2011 at 06:28:13PM -0500, Wenda Ni wrote:
>    Hello,
>    We have default xen 3.1.2 on centOS 5.5. We now want to upgrade xen 3.1.2
>    to xen 4.0.1 while using the existing dom0 kernel (2.6.18). I followed the
>    instructions on [1]http://wiki.xensource.com/xenwiki/Xen4.0
>  hg clone -r RELEASE-4.0.1 [2]http://xenbits.xen.org/xen-4.0-testing.hg
>  cd xen-4.0-testing.hg
>  make xen
>  make tools
>  make stubdom
>  make install-xen
>  make install-tools
>  make install-stubdom
>    And at last, we update the grub.conf/menu.lst to use the newly installed
>    Xen 4.0 hypervisor. The menu.lst is attached as follows:
>    title CentOS (2.6.18-194.32.1.el5xen)
>        root (hd0,0)
>        #kernel /xen.gz-2.6.18-194.32.1.el5
>        kernel /xen-4.0.1.gz
>        module /vmlinuz-2.6.18-194.32.1.el5xen ro
>    root=/dev/VolGroup00/LogVol00 rhgb quiet
>        module /initrd-2.6.18-194.32.1.el5xen.img
>    Due to some policy, we use static ip address. The network setup is exactly
>    the same before and after the change from " /xen.gz-2.6.18-194.32.1.el5"
>    to "/xen-4.0.1.gz ". But it seems that the network is down after reboot.
>    Could anyone know my mistake or problem?

Try disabling (comment out) network-script in "/etc/xen/xend-config.sxp"
and reboot.

Then set up the required bridges using the centos network scripts instead,
ie. /etc/sysconfig/network-scripts/ifcfg*.

-- Pasi

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