[ 1688.475461] br0: port 1(dummy0) entered blocking state
[ 1688.475541] br0: port 1(dummy0) entered disabled state
[ 1688.475604] dummy0: entered allmulticast mode
[ 1688.475693] dummy0: entered promiscuous mode
[ 1688.478172] br0: port 1(dummy0) entered blocking state
[ 1688.478206] br0: port 1(dummy0) entered forwarding state
[ 1688.643917] dummy0: left allmulticast mode
[ 1688.643951] dummy0: left promiscuous mode
[ 1688.643983] br0: port 1(dummy0) entered disabled state