[ 2168.186092][ T3855] br0: port 1(dummy0) entered blocking state
[ 2168.186946][ T3855] br0: port 1(dummy0) entered disabled state
[ 2168.187473][ T3855] dummy0: entered allmulticast mode
[ 2168.188588][ T3855] dummy0: entered promiscuous mode
[ 2168.221819][ T3856] br0: port 1(dummy0) entered blocking state
[ 2168.222246][ T3856] br0: port 1(dummy0) entered forwarding state
[ 2170.707340][   T12] dummy0: left allmulticast mode
[ 2170.708661][   T12] dummy0: left promiscuous mode
[ 2170.709036][   T12] br0: port 1(dummy0) entered disabled state