[ 1748.086557] br0: port 1(dummy0) entered blocking state
[ 1748.086642] br0: port 1(dummy0) entered disabled state
[ 1748.086710] dummy0: entered allmulticast mode
[ 1748.086798] dummy0: entered promiscuous mode
[ 1748.090394] br0: port 1(dummy0) entered blocking state
[ 1748.090426] br0: port 1(dummy0) entered forwarding state
[ 1748.358297] dummy0: left allmulticast mode
[ 1748.358330] dummy0: left promiscuous mode
[ 1748.358366] br0: port 1(dummy0) entered disabled state