На шаге 6 было:
---------------

# ip -c a
[...]
3: ens20: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master ovs-system state DOWN group default qlen 1000  
   link/ether c2:f4:d8:4e:04:d7 brd ff:ff:ff:ff:ff:ff  
   altname enp0s20  
4: ens21: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master ovs-system state DOWN group default qlen 1000  
   link/ether 2a:8f:40:13:3a:bf brd ff:ff:ff:ff:ff:ff  
   altname enp0s21  
5: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000  
   link/ether b2:de:a3:a5:19:56 brd ff:ff:ff:ff:ff:ff  
6: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000  
   link/ether 7e:cf:db:d9:c0:4d brd ff:ff:ff:ff:ff:ff  
   inet 10.0.1.6/24 scope global br0  
      valid_lft forever preferred_lft forever  
   inet6 fe80::7ccf:dbff:fed9:c04d/64 scope link proto kernel_ll    
      valid_lft forever preferred_lft forever

# ip -c l
[...]
3: ens20: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master ovs-system state DOWN mode DEFAULT group default qlen 1000  
   link/ether c2:f4:d8:4e:04:d7 brd ff:ff:ff:ff:ff:ff  
   altname enp0s20  
4: ens21: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master ovs-system state DOWN mode DEFAULT group default qlen 1000  
   link/ether 2a:8f:40:13:3a:bf brd ff:ff:ff:ff:ff:ff  
   altname enp0s21  
5: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000  
   link/ether b2:de:a3:a5:19:56 brd ff:ff:ff:ff:ff:ff  
6: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000  
   link/ether 7e:cf:db:d9:c0:4d brd ff:ff:ff:ff:ff:ff

# ovs-vsctl show
c1ba6d33-9740-4dde-8232-a4647d82c60a  
   Bridge br0  
       Port br0  
           Interface br0  
               type: internal  
       Port ens21  
           Interface ens21  
       Port ens20  
           Interface ens20  
   ovs_version: "3.2.1"


На шаге 8:
----------

# ip -c a
[...]
3: ens20: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000  
   link/ether c2:f4:d8:4e:04:d7 brd ff:ff:ff:ff:ff:ff  
   altname enp0s20  
4: ens21: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000  
   link/ether 2a:8f:40:13:3a:bf brd ff:ff:ff:ff:ff:ff  
   altname enp0s21

# ip -c l
[...]
3: ens20: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000  
   link/ether c2:f4:d8:4e:04:d7 brd ff:ff:ff:ff:ff:ff  
   altname enp0s20  
4: ens21: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000  
   link/ether 2a:8f:40:13:3a:bf brd ff:ff:ff:ff:ff:ff  
   altname enp0s21

# ovs-vsctl show  
c1ba6d33-9740-4dde-8232-a4647d82c60a  
   ovs_version: "3.2.1"