[ 1809.249333] br0: port 1(dummy0) entered blocking state
[ 1809.249404] br0: port 1(dummy0) entered disabled state
[ 1809.249476] dummy0: entered allmulticast mode
[ 1809.249565] dummy0: entered promiscuous mode
[ 1809.253230] br0: port 1(dummy0) entered blocking state
[ 1809.253264] br0: port 1(dummy0) entered forwarding state
[ 1809.530645] dummy0: left allmulticast mode
[ 1809.530679] dummy0: left promiscuous mode
[ 1809.530708] br0: port 1(dummy0) entered disabled state