[ 1704.773177] br0: port 1(dummy0) entered blocking state
[ 1704.773213] br0: port 1(dummy0) entered disabled state
[ 1704.773247] dummy0: entered allmulticast mode
[ 1704.773303] dummy0: entered promiscuous mode
[ 1704.776125] br0: port 1(dummy0) entered blocking state
[ 1704.776158] br0: port 1(dummy0) entered forwarding state
[ 1704.977489] dummy0: left allmulticast mode
[ 1704.977520] dummy0: left promiscuous mode
[ 1704.977548] br0: port 1(dummy0) entered disabled state