[ 1683.402629] br0: port 1(dummy0) entered blocking state
[ 1683.402665] br0: port 1(dummy0) entered disabled state
[ 1683.402701] dummy0: entered allmulticast mode
[ 1683.402755] dummy0: entered promiscuous mode
[ 1683.405654] br0: port 1(dummy0) entered blocking state
[ 1683.405718] br0: port 1(dummy0) entered forwarding state
[ 1683.593496] dummy0: left allmulticast mode
[ 1683.593527] dummy0: left promiscuous mode
[ 1683.593557] br0: port 1(dummy0) entered disabled state