OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:2e:33:1a:53:1d:86
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:70:fc:00
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:4e:4a:07:ca:14:27
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:c2:6a:5d:43:27:8f
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:70:fc:00
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
