[ 1746.029250] br0: port 1(dummy0) entered blocking state
[ 1746.029297] br0: port 1(dummy0) entered disabled state
[ 1746.029338] dummy0: entered allmulticast mode
[ 1746.029389] dummy0: entered promiscuous mode
[ 1746.032850] br0: port 1(dummy0) entered blocking state
[ 1746.032913] br0: port 1(dummy0) entered forwarding state
[ 1746.252104] dummy0: left allmulticast mode
[ 1746.252148] dummy0: left promiscuous mode
[ 1746.252182] br0: port 1(dummy0) entered disabled state