# virsh start avocado-vt-vm1 
Domain 'avocado-vt-vm1' started

#  tc class show dev vnet0
class htb 1:1 parent 1:fffe prio 0 rate 800Kbit ceil 2400Kbit burst 500Kb cburst 500Kb
class htb 1:fffe root rate 2400Kbit ceil 2400Kbit burst 1500b cburst 1500b
#  tc filter show dev vnet0 parent ffff:
filter ingress protocol all pref 1 matchall chain 0 
filter ingress protocol all pref 1 matchall chain 0 handle 0x1 
  not_in_hw
    action order 1:  police 0x1 rate 1600Kbit burst 600Kb mtu 64Kb action drop/continue overhead 0b 
    ref 1 bind 1 

#  virsh update-device avocado-vt-vm1 iface.xml 
Device updated successfully

#  tc class show dev vnet0
class htb 1:1 parent 1:fffe prio 0 rate 800Kbit ceil 2400Kbit burst 500Kb cburst 500Kb
class htb 1:fffe root rate 2400Kbit ceil 2400Kbit burst 1500b cburst 1500b
#  tc filter show dev vnet0 parent ffff:
filter ingress protocol all pref 1 matchall chain 0 
filter ingress protocol all pref 1 matchall chain 0 handle 0x1 
  not_in_hw
    action order 1:  police 0x1 rate 1600Kbit burst 600Kb mtu 64Kb action drop/continue overhead 0b 
    ref 1 bind 1 

#  virsh dumpxml avocado-vt-vm1 --xpath //interface
<interface type="bridge">
  <mac address="52:54:00:ac:42:67"/>
  <source bridge="ovsbr0"/>
  <virtualport type="openvswitch">
    <parameters interfaceid="fc419b6a-ef95-4e4d-b7e8-86ec3b1954b7"/>
  </virtualport>
  <target dev="vnet0"/>
  <model type="virtio"/>
  <alias name="net0"/>
  <address type="pci" domain="0x0000" bus="0x10" slot="0x01" function="0x0"/>
</interface>
# virsh domiftune avocado-vt-vm1  vnet0
inbound.average: 0
inbound.peak   : 0
inbound.burst  : 0
inbound.floor  : 0
outbound.average: 0
outbound.peak  : 0
outbound.burst : 0

# ovs-vsctl list qos
_uuid               : a264b273-66bf-42ca-b229-0b9c85167ffa
external_ids        : {ifname=vnet0, vm-id="61b115cb-d64b-404f-a92d-1743e1102472"}
other_config        : {burst="4096000", max-rate="2400000", min-rate="800000"}
queues              : {0=1baebdf5-b090-4b66-b74a-a19eac1aad9b}
type                : linux-htb

# virsh shutdown avocado-vt-vm1 
Domain 'avocado-vt-vm1' is being shutdown

# ovs-vsctl list qos
_uuid               : a264b273-66bf-42ca-b229-0b9c85167ffa
external_ids        : {ifname=vnet0, vm-id="61b115cb-d64b-404f-a92d-1743e1102472"}
other_config        : {burst="4096000", max-rate="2400000", min-rate="800000"}
queues              : {0=1baebdf5-b090-4b66-b74a-a19eac1aad9b}
type                : linux-htb