[ 1680.458949] br0: port 1(dummy0) entered blocking state
[ 1680.459024] br0: port 1(dummy0) entered disabled state
[ 1680.459088] dummy0: entered allmulticast mode
[ 1680.459173] dummy0: entered promiscuous mode
[ 1680.461638] br0: port 1(dummy0) entered blocking state
[ 1680.461698] br0: port 1(dummy0) entered forwarding state
[ 1680.638470] dummy0: left allmulticast mode
[ 1680.638506] dummy0: left promiscuous mode
[ 1680.638563] br0: port 1(dummy0) entered disabled state