OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:46:9e:9c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan20): addr:5e:b8:10:52:74:b5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:8e:e9:85:38:f1:8a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:b6:8d:f7:27:62:3a
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:46:9e:9c
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
