[ 1639.507548] br0: port 1(dummy0) entered blocking state
[ 1639.507614] br0: port 1(dummy0) entered disabled state
[ 1639.507685] dummy0: entered allmulticast mode
[ 1639.507769] dummy0: entered promiscuous mode
[ 1639.510620] br0: port 1(dummy0) entered blocking state
[ 1639.510651] br0: port 1(dummy0) entered forwarding state
[ 1639.712176] dummy0: left allmulticast mode
[ 1639.712214] dummy0: left promiscuous mode
[ 1639.712243] br0: port 1(dummy0) entered disabled state