[ 1720.207286] br0: port 1(dummy0) entered blocking state
[ 1720.207324] br0: port 1(dummy0) entered disabled state
[ 1720.207357] dummy0: entered allmulticast mode
[ 1720.207420] dummy0: entered promiscuous mode
[ 1720.210985] br0: port 1(dummy0) entered blocking state
[ 1720.211047] br0: port 1(dummy0) entered forwarding state
[ 1720.480585] dummy0: left allmulticast mode
[ 1720.480624] dummy0: left promiscuous mode
[ 1720.480676] br0: port 1(dummy0) entered disabled state