OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:b4:46:1e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:9e:6a:cb:7e:5e:29
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan21): addr:ca:50:b6:54:b2:a1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:02:93:53:13:05:02
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:b4:46:1e
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
