[ 1601.007118] br0: port 1(dummy0) entered blocking state
[ 1601.007198] br0: port 1(dummy0) entered disabled state
[ 1601.007264] dummy0: entered allmulticast mode
[ 1601.007360] dummy0: entered promiscuous mode
[ 1601.009953] br0: port 1(dummy0) entered blocking state
[ 1601.009985] br0: port 1(dummy0) entered forwarding state
[ 1601.194476] dummy0: left allmulticast mode
[ 1601.194550] dummy0: left promiscuous mode
[ 1601.194610] br0: port 1(dummy0) entered disabled state