[ 1801.332793] br0: port 1(dummy0) entered blocking state
[ 1801.332833] br0: port 1(dummy0) entered disabled state
[ 1801.332868] dummy0: entered allmulticast mode
[ 1801.332924] dummy0: entered promiscuous mode
[ 1801.336358] br0: port 1(dummy0) entered blocking state
[ 1801.336427] br0: port 1(dummy0) entered forwarding state
[ 1801.597039] dummy0: left allmulticast mode
[ 1801.597070] dummy0: left promiscuous mode
[ 1801.597102] br0: port 1(dummy0) entered disabled state