Comment 14 for bug 1815989

I use some virsh commands to avoid the first situation, modify the migration speed to 1M/s, make sure the flows and tag are configed in br-int before live-migration completed.
# virsh migrate-setspeed instance-0000003b --bandwidth 1
# virsh migrate-getspeed instance-0000003b
# virsh migrate --live --persistent --undefinesource instance-0000003b qemu+tcp://node-3/system

And add a new rarp flow into table=71:
priority=95,ct_state=-trk,rarp,reg5=0x13,in_port=19,dl_src=fa:16:3e:09:3d:10 actions=resubmit(,94)

Then there is no more packets dropped in several live-migration tests。