[ 1740.074258] br0: port 1(dummy0) entered blocking state
[ 1740.074329] br0: port 1(dummy0) entered disabled state
[ 1740.074396] dummy0: entered allmulticast mode
[ 1740.074479] dummy0: entered promiscuous mode
[ 1740.077891] br0: port 1(dummy0) entered blocking state
[ 1740.077920] br0: port 1(dummy0) entered forwarding state
[ 1740.305595] dummy0: left allmulticast mode
[ 1740.305633] dummy0: left promiscuous mode
[ 1740.305664] br0: port 1(dummy0) entered disabled state