OFPST_PORT_DESC reply (xid=0x2):
 1(vlan21): addr:c6:e3:19:e6:a1:b0
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:2e:4e:e1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:fa:3b:84:e4:ef:6b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan20): addr:1a:ee:2f:e0:67:f2
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:2e:4e:e1
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
