[ 1756.336764] br0: port 1(dummy0) entered blocking state
[ 1756.336812] br0: port 1(dummy0) entered disabled state
[ 1756.336846] dummy0: entered allmulticast mode
[ 1756.336900] dummy0: entered promiscuous mode
[ 1756.339611] br0: port 1(dummy0) entered blocking state
[ 1756.339642] br0: port 1(dummy0) entered forwarding state
[ 1756.521860] dummy0: left allmulticast mode
[ 1756.521895] dummy0: left promiscuous mode
[ 1756.521950] br0: port 1(dummy0) entered disabled state