[ 1800.237334] br0: port 1(dummy0) entered blocking state
[ 1800.237381] br0: port 1(dummy0) entered disabled state
[ 1800.237419] dummy0: entered allmulticast mode
[ 1800.237483] dummy0: entered promiscuous mode
[ 1800.241383] br0: port 1(dummy0) entered blocking state
[ 1800.241416] br0: port 1(dummy0) entered forwarding state
[ 1800.529234] dummy0: left allmulticast mode
[ 1800.529276] dummy0: left promiscuous mode
[ 1800.529312] br0: port 1(dummy0) entered disabled state