OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:54:6a:73
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:6a:be:bc:2f:68:18
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:7a:ab:54:ac:7b:08
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:d6:b9:77:70:a0:b5
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:54:6a:73
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
