[  680.967855] br0: port 1(dummy0) entered blocking state
[  680.967905] br0: port 1(dummy0) entered disabled state
[  680.967937] dummy0: entered allmulticast mode
[  680.967986] dummy0: entered promiscuous mode
[  680.970825] br0: port 1(dummy0) entered blocking state
[  680.970892] br0: port 1(dummy0) entered forwarding state
[  681.157267] dummy0: left allmulticast mode
[  681.157312] dummy0: left promiscuous mode
[  681.157344] br0: port 1(dummy0) entered disabled state