[ 1976.972385][ T2828] br0: port 1(dummy0) entered blocking state
[ 1976.972627][ T2828] br0: port 1(dummy0) entered disabled state
[ 1976.973273][ T2828] dummy0: entered allmulticast mode
[ 1976.974526][ T2828] dummy0: entered promiscuous mode
[ 1977.005611][ T2829] br0: port 1(dummy0) entered blocking state
[ 1977.005939][ T2829] br0: port 1(dummy0) entered forwarding state
[ 1978.945093][   T12] dummy0: left allmulticast mode
[ 1978.945378][   T12] dummy0: left promiscuous mode
[ 1978.945592][   T12] br0: port 1(dummy0) entered disabled state