[ 1748.061578] br0: port 1(dummy0) entered blocking state
[ 1748.061635] br0: port 1(dummy0) entered disabled state
[ 1748.061666] dummy0: entered allmulticast mode
[ 1748.061724] dummy0: entered promiscuous mode
[ 1748.064523] br0: port 1(dummy0) entered blocking state
[ 1748.064604] br0: port 1(dummy0) entered forwarding state
[ 1748.275019] dummy0: left allmulticast mode
[ 1748.275109] dummy0: left promiscuous mode
[ 1748.275247] br0: port 1(dummy0) entered disabled state