[ 1915.469372] br0: port 1(dummy0) entered blocking state
[ 1915.469452] br0: port 1(dummy0) entered disabled state
[ 1915.469517] dummy0: entered allmulticast mode
[ 1915.469607] dummy0: entered promiscuous mode
[ 1915.473282] br0: port 1(dummy0) entered blocking state
[ 1915.473318] br0: port 1(dummy0) entered forwarding state
[ 1915.756890] dummy0: left allmulticast mode
[ 1915.756965] dummy0: left promiscuous mode
[ 1915.757052] br0: port 1(dummy0) entered disabled state