[ 1603.352526] br0: port 1(dummy0) entered blocking state
[ 1603.352571] br0: port 1(dummy0) entered disabled state
[ 1603.352603] dummy0: entered allmulticast mode
[ 1603.352654] dummy0: entered promiscuous mode
[ 1603.355206] br0: port 1(dummy0) entered blocking state
[ 1603.355240] br0: port 1(dummy0) entered forwarding state
[ 1603.542346] dummy0: left allmulticast mode
[ 1603.542387] dummy0: left promiscuous mode
[ 1603.542412] br0: port 1(dummy0) entered disabled state