[libvirt-users] Undoing domiftune changes

If I apply some network limits with domiftune, how do I undo them (without restarting the VM?) So let's say I did: # virsh domiftune SRVID8736 vnet0 inbound.average: 0 inbound.peak : 0 inbound.burst : 0 outbound.average: 0 outbound.peak : 0 outbound.burst : 0 # virsh domiftune SRVID8736 vnet0 --outbound 1000,1000,1000 How I do revert this back to what it was before I set it? If I try "--outbound 0,0,0" it fails, saying "error: outbound average is mandatory"