[ 1751.290260] br0: port 1(dummy0) entered blocking state
[ 1751.290299] br0: port 1(dummy0) entered disabled state
[ 1751.290338] dummy0: entered allmulticast mode
[ 1751.290396] dummy0: entered promiscuous mode
[ 1751.293272] br0: port 1(dummy0) entered blocking state
[ 1751.293337] br0: port 1(dummy0) entered forwarding state
[ 1751.495442] dummy0: left allmulticast mode
[ 1751.495482] dummy0: left promiscuous mode
[ 1751.495509] br0: port 1(dummy0) entered disabled state