[ 1904.326061] br0: port 1(dummy0) entered blocking state
[ 1904.326102] br0: port 1(dummy0) entered disabled state
[ 1904.326140] dummy0: entered allmulticast mode
[ 1904.326190] dummy0: entered promiscuous mode
[ 1904.329387] br0: port 1(dummy0) entered blocking state
[ 1904.329451] br0: port 1(dummy0) entered forwarding state
[ 1904.575106] dummy0: left allmulticast mode
[ 1904.575134] dummy0: left promiscuous mode
[ 1904.575161] br0: port 1(dummy0) entered disabled state