[ 1874.651400] br0: port 1(dummy0) entered blocking state
[ 1874.651443] br0: port 1(dummy0) entered disabled state
[ 1874.651472] dummy0: entered allmulticast mode
[ 1874.651516] dummy0: entered promiscuous mode
[ 1874.655137] br0: port 1(dummy0) entered blocking state
[ 1874.655195] br0: port 1(dummy0) entered forwarding state
[ 1874.924830] dummy0: left allmulticast mode
[ 1874.924870] dummy0: left promiscuous mode
[ 1874.924897] br0: port 1(dummy0) entered disabled state