[    2.952016] br0: port 1(dummy0) entered blocking state
[    2.952051] br0: port 1(dummy0) entered disabled state
[    2.952089] dummy0: entered allmulticast mode
[    2.952137] dummy0: entered promiscuous mode
[    2.955433] br0: port 1(dummy0) entered blocking state
[    2.955497] br0: port 1(dummy0) entered forwarding state
[    3.178658] dummy0: left allmulticast mode
[    3.178688] dummy0: left promiscuous mode
[    3.178719] br0: port 1(dummy0) entered disabled state