[ 1837.269697] br0: port 1(dummy0) entered blocking state
[ 1837.269734] br0: port 1(dummy0) entered disabled state
[ 1837.269773] dummy0: entered allmulticast mode
[ 1837.269825] dummy0: entered promiscuous mode
[ 1837.273099] br0: port 1(dummy0) entered blocking state
[ 1837.273164] br0: port 1(dummy0) entered forwarding state
[ 1837.494922] dummy0: left allmulticast mode
[ 1837.494957] dummy0: left promiscuous mode
[ 1837.495012] br0: port 1(dummy0) entered disabled state