[ 1647.210989] br0: port 1(dummy0) entered blocking state
[ 1647.211014] br0: port 1(dummy0) entered disabled state
[ 1647.211036] dummy0: entered allmulticast mode
[ 1647.211074] dummy0: entered promiscuous mode
[ 1647.213759] br0: port 1(dummy0) entered blocking state
[ 1647.213807] br0: port 1(dummy0) entered forwarding state
[ 1647.393523] dummy0: left allmulticast mode
[ 1647.393546] dummy0: left promiscuous mode
[ 1647.393569] br0: port 1(dummy0) entered disabled state