[ 1611.472202] br0: port 1(dummy0) entered blocking state
[ 1611.472240] br0: port 1(dummy0) entered disabled state
[ 1611.472276] dummy0: entered allmulticast mode
[ 1611.472325] dummy0: entered promiscuous mode
[ 1611.475209] br0: port 1(dummy0) entered blocking state
[ 1611.475275] br0: port 1(dummy0) entered forwarding state
[ 1611.667764] dummy0: left allmulticast mode
[ 1611.667835] dummy0: left promiscuous mode
[ 1611.667911] br0: port 1(dummy0) entered disabled state