[Qemu-devel] why mac addresses are different between inside and outside of vm

[yue-kvm]

hi, all

nwfilter has many rules which depends on the 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

it looks like vnet* are always changed to start with FE, why?

where is the  code to  do this?

 

thanks very much.