[libvirt] why mac are different between inside and outside of vm

[Daniel P. Berrange]

On Sat, Feb 08, 2014 at 11:46:21AM +0800, yue wrote:
> hi, all
> nwfilter has many rules which depends on mac of vm, but i find  the mac address inside vm is different from mac outside of vm.
> outside mac:
> vnet0 Link encap:Ethernet HWaddr FE:54:00:71:15:7B ,
> inside mac:
> eth0 Link encap:Ethernet HWaddr 52:54:00:71:15:7B ,virtio 
>  
> why?
>  i am afraid that  nwfilter use the wrong one.   
> how nwfilter chooses mac? and what is the usage of vnet0's mac?

You can basically ignore the mac addr on the host vnetNNN devices.
They don't affect the traffic to/from the guest.

Daniel
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