[ 1751.274217] br0: port 1(dummy0) entered blocking state
[ 1751.274294] br0: port 1(dummy0) entered disabled state
[ 1751.274359] dummy0: entered allmulticast mode
[ 1751.274446] dummy0: entered promiscuous mode
[ 1751.277230] br0: port 1(dummy0) entered blocking state
[ 1751.277260] br0: port 1(dummy0) entered forwarding state
[ 1751.469065] dummy0: left allmulticast mode
[ 1751.469101] dummy0: left promiscuous mode
[ 1751.469188] br0: port 1(dummy0) entered disabled state