OFPST_PORT_DESC reply (xid=0x2):
 1(enp1s0): addr:52:54:00:bd:98:26
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 2(vlan22): addr:6a:29:25:a7:8b:74
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vlan20): addr:1e:3a:c3:b2:9f:fc
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 4(vlan21): addr:0e:90:5b:26:30:9b
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-ex): addr:52:54:00:bd:98:26
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
