[ 1848.635270] br0: port 1(dummy0) entered blocking state
[ 1848.635344] br0: port 1(dummy0) entered disabled state
[ 1848.635414] dummy0: entered allmulticast mode
[ 1848.635501] dummy0: entered promiscuous mode
[ 1848.638930] br0: port 1(dummy0) entered blocking state
[ 1848.638971] br0: port 1(dummy0) entered forwarding state
[ 1848.874496] dummy0: left allmulticast mode
[ 1848.874558] dummy0: left promiscuous mode
[ 1848.874646] br0: port 1(dummy0) entered disabled state