[ 1821.522396] br0: port 1(dummy0) entered blocking state
[ 1821.522461] br0: port 1(dummy0) entered disabled state
[ 1821.522527] dummy0: entered allmulticast mode
[ 1821.522617] dummy0: entered promiscuous mode
[ 1821.526231] br0: port 1(dummy0) entered blocking state
[ 1821.526263] br0: port 1(dummy0) entered forwarding state
[ 1821.800299] dummy0: left allmulticast mode
[ 1821.800333] dummy0: left promiscuous mode
[ 1821.800366] br0: port 1(dummy0) entered disabled state