[ 1638.510584] br0: port 1(dummy0) entered blocking state
[ 1638.510627] br0: port 1(dummy0) entered disabled state
[ 1638.510663] dummy0: entered allmulticast mode
[ 1638.510719] dummy0: entered promiscuous mode
[ 1638.513588] br0: port 1(dummy0) entered blocking state
[ 1638.513623] br0: port 1(dummy0) entered forwarding state
[ 1638.714548] dummy0: left allmulticast mode
[ 1638.714628] dummy0: left promiscuous mode
[ 1638.714694] br0: port 1(dummy0) entered disabled state