[ 1904.476063] br0: port 1(dummy0) entered blocking state
[ 1904.476144] br0: port 1(dummy0) entered disabled state
[ 1904.476213] dummy0: entered allmulticast mode
[ 1904.476304] dummy0: entered promiscuous mode
[ 1904.479131] br0: port 1(dummy0) entered blocking state
[ 1904.479165] br0: port 1(dummy0) entered forwarding state
[ 1904.666726] dummy0: left allmulticast mode
[ 1904.666764] dummy0: left promiscuous mode
[ 1904.666796] br0: port 1(dummy0) entered disabled state