[ 1821.737743] br0: port 1(dummy0) entered blocking state
[ 1821.737782] br0: port 1(dummy0) entered disabled state
[ 1821.737814] dummy0: entered allmulticast mode
[ 1821.737869] dummy0: entered promiscuous mode
[ 1821.741367] br0: port 1(dummy0) entered blocking state
[ 1821.741429] br0: port 1(dummy0) entered forwarding state
[ 1821.994521] dummy0: left allmulticast mode
[ 1821.994550] dummy0: left promiscuous mode
[ 1821.994584] br0: port 1(dummy0) entered disabled state