[ 1555.034634][ T2994] br0: port 1(dummy0) entered blocking state
[ 1555.034765][ T2994] br0: port 1(dummy0) entered disabled state
[ 1555.034876][ T2994] dummy0: entered allmulticast mode
[ 1555.035540][ T2994] dummy0: entered promiscuous mode
[ 1555.054044][ T2995] br0: port 1(dummy0) entered blocking state
[ 1555.054202][ T2995] br0: port 1(dummy0) entered forwarding state
[ 1556.287004][   T12] dummy0: left allmulticast mode
[ 1556.289252][   T12] dummy0: left promiscuous mode
[ 1556.289431][   T12] br0: port 1(dummy0) entered disabled state