Re: [Xen-devel] virbr0/bridge: No such file or directory

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Fri, Aug 26, 2011 at 02:25:57PM +0300, Pasi Kärkkäinen wrote:
> On Fri, Aug 26, 2011 at 01:13:14AM -0500, Scott Meyers wrote:
> > 
> > This is fresh install of CentOS v6 and Xen v4.1 on a new Dell server 
> > following the tutorial posted at: 
> > http://wiki.xensource.com/xenwiki/RHEL6Xen4Tutorial
> >  
> > Every thing went just fine, yet virbr0 won't work and when I run brctl show 
> > I get the following error message:
> >  
> > [root@pe1950 ~]# brctl show
> > bridge name     bridge id               STP enabled     interfaces
> > virbr0          /sys/class/net/virbr0/bridge: No such file or directory
> > /sys/class/net/virbr0/bridge: No such file or directory
> > /sys/class/net/virbr0/bridge: No such file or directory
> > /sys/class/net/virbr0/bridge: No such file or directory
> > /sys/class/net/virbr0/bridge: No such file or directory
> > /sys/class/net/virbr0/bridge: No such file or directory
> > /sys/class/net/virbr0/bridge: No such file or directory
> > /sys/class/net/virbr0/bridge: No such file or directory
> > /sys/class/net/virbr0/bridge: No such file or directory
> > /sys/class/net/virbr0/bridge: No such file or directory
> > /sys/class/net/virbr0/bridge: No such file or directory
> > /sys/class/net/virbr0/bridge: No such file or directory
> > 8000.000000000000       yes
> >  
> > FYI, /sys/class/net/virbr0/bridge does exist. That said I can't install any 
> > DomU because virbr0 is down/not working.
> >  
> > I read all threads about this problem, but none gave any solutions. Please 
> > help. Thank you
> >                                       
> 
> 
> Those errors are related to the bridge-utils rpm version..
> There is a workaround documented somewhere.. probably on centos mailinglist.
> 

or actually it's because the stock rhel6 kernel includes some patch to 
kernel bridging code so rhel6 bridge-utils rpm had to be patched for the kernel 
change.

so when you use xen.git 2.6.32 kernel (which is not based on rhel6 kernel) you 
don't have
the kernel change for bridging and the patched bridge-utils rpm doesn't work 
anymore.

Try using mayoung's el6 xendom0 kernel rpm.. it *is* based on rhel6 kernel so 
it includes the bridging patch.

-- Pasi


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