[ 1772.622680] br0: port 1(dummy0) entered blocking state
[ 1772.622718] br0: port 1(dummy0) entered disabled state
[ 1772.622761] dummy0: entered allmulticast mode
[ 1772.622815] dummy0: entered promiscuous mode
[ 1772.626059] br0: port 1(dummy0) entered blocking state
[ 1772.626093] br0: port 1(dummy0) entered forwarding state
[ 1772.839915] dummy0: left allmulticast mode
[ 1772.840009] dummy0: left promiscuous mode
[ 1772.840074] br0: port 1(dummy0) entered disabled state