OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:94:8d:8d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:8a:df:3e:01:a7:62
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:1a:c6:47:51:f8:e3
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:b2:bb:2e:30:89:48
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:94:8d:8d
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
