[ 1681.247458] br0: port 1(dummy0) entered blocking state
[ 1681.247544] br0: port 1(dummy0) entered disabled state
[ 1681.247615] dummy0: entered allmulticast mode
[ 1681.247705] dummy0: entered promiscuous mode
[ 1681.251165] br0: port 1(dummy0) entered blocking state
[ 1681.251196] br0: port 1(dummy0) entered forwarding state
[ 1681.485218] dummy0: left allmulticast mode
[ 1681.485263] dummy0: left promiscuous mode
[ 1681.485355] br0: port 1(dummy0) entered disabled state