[ 2223.487315][ T5645] br0: port 1(dummy0) entered blocking state
[ 2223.487499][ T5645] br0: port 1(dummy0) entered disabled state
[ 2223.487662][ T5645] dummy0: entered allmulticast mode
[ 2223.488705][ T5645] dummy0: entered promiscuous mode
[ 2223.531276][ T5646] br0: port 1(dummy0) entered blocking state
[ 2223.531561][ T5646] br0: port 1(dummy0) entered forwarding state
[ 2225.761791][   T12] dummy0: left allmulticast mode
[ 2225.762919][   T12] dummy0: left promiscuous mode
[ 2225.763229][   T12] br0: port 1(dummy0) entered disabled state