[ 1904.499628] br0: port 1(dummy0) entered blocking state
[ 1904.499676] br0: port 1(dummy0) entered disabled state
[ 1904.499715] dummy0: entered allmulticast mode
[ 1904.499771] dummy0: entered promiscuous mode
[ 1904.503355] br0: port 1(dummy0) entered blocking state
[ 1904.503418] br0: port 1(dummy0) entered forwarding state
[ 1904.770340] dummy0: left allmulticast mode
[ 1904.770382] dummy0: left promiscuous mode
[ 1904.770412] br0: port 1(dummy0) entered disabled state