[ 1700.451147] br0: port 1(dummy0) entered blocking state
[ 1700.451207] br0: port 1(dummy0) entered disabled state
[ 1700.451261] dummy0: entered allmulticast mode
[ 1700.451341] dummy0: entered promiscuous mode
[ 1700.454117] br0: port 1(dummy0) entered blocking state
[ 1700.454137] br0: port 1(dummy0) entered forwarding state
[ 1700.647105] dummy0: left allmulticast mode
[ 1700.647129] dummy0: left promiscuous mode
[ 1700.647147] br0: port 1(dummy0) entered disabled state