[ 1874.652423] br0: port 1(dummy0) entered blocking state
[ 1874.652474] br0: port 1(dummy0) entered disabled state
[ 1874.652511] dummy0: entered allmulticast mode
[ 1874.652568] dummy0: entered promiscuous mode
[ 1874.656297] br0: port 1(dummy0) entered blocking state
[ 1874.656332] br0: port 1(dummy0) entered forwarding state
[ 1874.927884] dummy0: left allmulticast mode
[ 1874.927933] dummy0: left promiscuous mode
[ 1874.927967] br0: port 1(dummy0) entered disabled state