Re: Ordering multiple network interfaces on vms

john fisher <john@xxxxxxxxxxxx> · Mon, 10 Dec 2012 12:27:03 -0800



    @Gao

      see the other thread Managing eths in vm from hv   too.

      
      We weren't able to order based on vnets, though I agree its seems
      intuitive. But our test wasn't thorough. Eric says:

      
      "Libvirt passes the devices to the qemu command line in the
    same order
    that they appear in the XML. It is not libvirt's fault if qemu then
    takes the command line arguments and presents it to the guest in
    such a
    way that the guest can initialize the devices in the order in which
    a
    bus scan finds them, rather than in the order they were presented on
    the
    command line."

      
      as far as I can tell the bridges are always setup first, then the
      direct VF connections. Whether this is caused by our hardware or
      Qemu or PCI I have no idea.

      
      Now, I am trying the idea of editing the /etc/udev/rules.d/70*
      file to move the MAC addresses around. Results are mixed. very
      puzzling.

      
      John

      
    On 12/08/2012 08:21 AM, Gao Yongwei
      wrote:

    
      2012/12/7 john fisher <john@xxxxxxxxxxxx>

         <target
          dev='vnet0'/>
      
      I think the vnet* can affect the order in vm.
    
    
    -- 
John Fisher
  

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