OFPST_PORT_DESC reply (xid=0x2):
 1(vlan20): addr:7a:87:1e:b6:d1:00
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(enp1s0): addr:52:54:00:be:4b:a9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan22): addr:e6:e5:e9:23:88:31
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:3e:fe:4e:96:17:26
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:be:4b:a9
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
