OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:b3:ad:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:9e:7b:62:85:6e:b9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:ee:6b:25:8f:b5:f3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:86:68:fb:ef:b9:8b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:b3:ad:64
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
