[ 1537.189908] br0: port 1(dummy0) entered blocking state
[ 1537.189994] br0: port 1(dummy0) entered disabled state
[ 1537.190060] dummy0: entered allmulticast mode
[ 1537.190146] dummy0: entered promiscuous mode
[ 1537.193018] br0: port 1(dummy0) entered blocking state
[ 1537.193057] br0: port 1(dummy0) entered forwarding state
[ 1537.394232] dummy0: left allmulticast mode
[ 1537.394269] dummy0: left promiscuous mode
[ 1537.394335] br0: port 1(dummy0) entered disabled state