[ 1756.778460] br0: port 1(dummy0) entered blocking state
[ 1756.778496] br0: port 1(dummy0) entered disabled state
[ 1756.778530] dummy0: entered allmulticast mode
[ 1756.778586] dummy0: entered promiscuous mode
[ 1756.781993] br0: port 1(dummy0) entered blocking state
[ 1756.782057] br0: port 1(dummy0) entered forwarding state
[ 1757.030260] dummy0: left allmulticast mode
[ 1757.030297] dummy0: left promiscuous mode
[ 1757.030325] br0: port 1(dummy0) entered disabled state