[ 1870.774317][ T8139] br0: port 1(dummy0) entered blocking state
[ 1870.774509][ T8139] br0: port 1(dummy0) entered disabled state
[ 1870.774671][ T8139] dummy0: entered allmulticast mode
[ 1870.775577][ T8139] dummy0: entered promiscuous mode
[ 1870.795231][ T8140] br0: port 1(dummy0) entered blocking state
[ 1870.795599][ T8140] br0: port 1(dummy0) entered forwarding state
[ 1872.655235][   T72] dummy0: left allmulticast mode
[ 1872.655702][   T72] dummy0: left promiscuous mode
[ 1872.655915][   T72] br0: port 1(dummy0) entered disabled state