OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:e2:26:ee:24:26:61
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:11:27:e4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:42:1b:4e:0f:fd:d6
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:56:b6:37:36:b5:dc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:11:27:e4
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
