[ 1756.241371] br0: port 1(dummy0) entered blocking state
[ 1756.241410] br0: port 1(dummy0) entered disabled state
[ 1756.241446] dummy0: entered allmulticast mode
[ 1756.241494] dummy0: entered promiscuous mode
[ 1756.244848] br0: port 1(dummy0) entered blocking state
[ 1756.244878] br0: port 1(dummy0) entered forwarding state
[ 1756.503738] dummy0: left allmulticast mode
[ 1756.503778] dummy0: left promiscuous mode
[ 1756.503809] br0: port 1(dummy0) entered disabled state