[ 1821.523250] br0: port 1(dummy0) entered blocking state
[ 1821.523293] br0: port 1(dummy0) entered disabled state
[ 1821.523328] dummy0: entered allmulticast mode
[ 1821.523377] dummy0: entered promiscuous mode
[ 1821.526731] br0: port 1(dummy0) entered blocking state
[ 1821.526763] br0: port 1(dummy0) entered forwarding state
[ 1821.754451] dummy0: left allmulticast mode
[ 1821.754489] dummy0: left promiscuous mode
[ 1821.754550] br0: port 1(dummy0) entered disabled state