[ 1914.252345] br0: port 1(dummy0) entered blocking state
[ 1914.252390] br0: port 1(dummy0) entered disabled state
[ 1914.252430] dummy0: entered allmulticast mode
[ 1914.252484] dummy0: entered promiscuous mode
[ 1914.256019] br0: port 1(dummy0) entered blocking state
[ 1914.256080] br0: port 1(dummy0) entered forwarding state
[ 1914.499661] dummy0: left allmulticast mode
[ 1914.499701] dummy0: left promiscuous mode
[ 1914.499764] br0: port 1(dummy0) entered disabled state