[ 1704.697786] br0: port 1(dummy0) entered blocking state
[ 1704.697872] br0: port 1(dummy0) entered disabled state
[ 1704.697946] dummy0: entered allmulticast mode
[ 1704.698039] dummy0: entered promiscuous mode
[ 1704.700948] br0: port 1(dummy0) entered blocking state
[ 1704.700980] br0: port 1(dummy0) entered forwarding state
[ 1704.908252] dummy0: left allmulticast mode
[ 1704.908349] dummy0: left promiscuous mode
[ 1704.908420] br0: port 1(dummy0) entered disabled state