[ 1712.040374] br0: port 1(dummy0) entered blocking state
[ 1712.040424] br0: port 1(dummy0) entered disabled state
[ 1712.040457] dummy0: entered allmulticast mode
[ 1712.040505] dummy0: entered promiscuous mode
[ 1712.043266] br0: port 1(dummy0) entered blocking state
[ 1712.043296] br0: port 1(dummy0) entered forwarding state
[ 1712.243105] dummy0: left allmulticast mode
[ 1712.243155] dummy0: left promiscuous mode
[ 1712.243185] br0: port 1(dummy0) entered disabled state