[ 1642.193270] br0: port 1(dummy0) entered blocking state
[ 1642.193343] br0: port 1(dummy0) entered disabled state
[ 1642.193420] dummy0: entered allmulticast mode
[ 1642.193505] dummy0: entered promiscuous mode
[ 1642.196292] br0: port 1(dummy0) entered blocking state
[ 1642.196321] br0: port 1(dummy0) entered forwarding state
[ 1642.375522] dummy0: left allmulticast mode
[ 1642.375555] dummy0: left promiscuous mode
[ 1642.375591] br0: port 1(dummy0) entered disabled state