[ 1804.481429] br0: port 1(dummy0) entered blocking state
[ 1804.481512] br0: port 1(dummy0) entered disabled state
[ 1804.481583] dummy0: entered allmulticast mode
[ 1804.481685] dummy0: entered promiscuous mode
[ 1804.485422] br0: port 1(dummy0) entered blocking state
[ 1804.485483] br0: port 1(dummy0) entered forwarding state
[ 1804.716494] dummy0: left allmulticast mode
[ 1804.716538] dummy0: left promiscuous mode
[ 1804.716569] br0: port 1(dummy0) entered disabled state