[  576.353939][T13857] br0: port 1(dummy0) entered blocking state
[  576.354086][T13857] br0: port 1(dummy0) entered disabled state
[  576.354192][T13857] dummy0: entered allmulticast mode
[  576.354666][T13857] dummy0: entered promiscuous mode
[  576.372012][T13858] br0: port 1(dummy0) entered blocking state
[  576.372168][T13858] br0: port 1(dummy0) entered forwarding state
[  577.587034][   T12] dummy0: left allmulticast mode
[  577.587172][   T12] dummy0: left promiscuous mode
[  577.587315][   T12] br0: port 1(dummy0) entered disabled state