Hi, all.
I create a vm and it's neutron port's mac address is "fa:16:3e:3f:02:ff". I see 
"fa:16:3e:3f:02:ff" inside vm when I run "ifconfig eth0". Why does vm's tap 
device's mac address is "fe:16:3e:3f:02:ff"? Why different between neutron 
port's mac address and tap device's mac address? Does libvirt create instance 
tap device and its mac address is generated randomly? 


Thx
zhi
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