Re: [Xen-users] SOLVED: Device 0 (vif) could nto be connected: backend device not found

[pak333@xxxxxxxxxxx]

Hi,

Thanks or all the suggestions. The problem was the lack of hotplug support!

The problem was solved by a reinstall of the native linux (RHEL4) with 
selecting all packages. I had initially chosen some packages and I believe 
hotplug support was left off (don't know which package it belonged to.

Regards
- Padma



 -------------- Original message ----------------------
From: Nivedita Singhvi <niv@xxxxxxxxxx>
> pak333@xxxxxxxxxxx wrote:
> > Hi,
> > 
> > I have seen many posts regarding this but have not found the soultion. So 
> please cna someone shed some light on this
> > Thanks
> > - padma
> 
> The usual reason is that the networking set up has failed
> at some point and exited prematurely (e.g. from network-bridge
> script).  Commonest problem is that brctl wasn't found,
> but there are a few others.
> 
> Unfortunately, no logs go into xend-debug.log. This seems
> to be something that changed a while ago (will look into it).
> 
> What usually happens is that things might appear to be
> kosher when they are not, and you might then try to create
> a guest under these circumstances, and run into a more
> inexplicable and unhelpful error message.
> 
> Check /var/log/xen-hotplug.log for any more information.
> 
> Also, put an explicit:
> 
> set -e
> exec 2>>/var/log/xend-debug.log
> 
> for instance, at the top of your network-bridge script.
> 
> 
> > I get this error when I do try to create a domU guest (xen 3.0.0, 2.6.12.6).
> > The vif is set to 
> > vif = [ ' mac=aa:00:00:00:11, bridge=xenbr0' ]
> >  and a "brctl show" shows
> > xenbr0    8000,fefffffff  interfaces vif0.0 peth0
> > 
> > Xend.log shows:
> >  ERROR (SrvBase:87) Request wait_for_devices failed.  Traceback (most 
> > recent 
> call last):
> >     File "/usr/lib/python/xen/web/SrvBase.py", line 85, in perform
> >       return op_method(op, req)
> >     File "/usr/lib/python/xen/xend/server/SrvDomain.py", line 72, in 
> op_wait_for  _devices
> >       return self.dom.waitForDevices()
> >     File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 1343, in 
> waitForDevi  ces
> >       self.waitForDevices_(c)
> >     File "/usr/lib/python/xen/xend/XendDomainInfo.py", line 971, in 
> waitForDevic  es_
> >       return self.getDeviceController(deviceClass).waitForDevices()
> >     File "/usr/lib/python/xen/xend/server/DevController.py", line 135, in 
> waitFo  rDevices
> >       return map(self.waitForDevice, self.deviceIDs())
> >     File "/usr/lib/python/xen/xend/server/DevController.py", line 151, in 
> waitFo  rDevice
> >       raise VmError("Device %s (%s) could not be connected. "
> >   VmError: Device 0 (vif) could not be connected. Backend device not found.
> > 
> > 
> > 
> > 
> > _______________________________________________
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> > Xen-users@xxxxxxxxxxxxxxxxxxx
> > http://lists.xensource.com/xen-users
> 
> 
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