OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:46:6f:38:13:2e:6e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:c9:f0:e5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:f6:a5:fc:ac:cb:60
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:a6:e8:33:45:c1:f1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:c9:f0:e5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
