[ 1664.301747] br0: port 1(dummy0) entered blocking state
[ 1664.301775] br0: port 1(dummy0) entered disabled state
[ 1664.301793] dummy0: entered allmulticast mode
[ 1664.301829] dummy0: entered promiscuous mode
[ 1664.304442] br0: port 1(dummy0) entered blocking state
[ 1664.304490] br0: port 1(dummy0) entered forwarding state
[ 1664.474432] dummy0: left allmulticast mode
[ 1664.474455] dummy0: left promiscuous mode
[ 1664.474476] br0: port 1(dummy0) entered disabled state