[ 1637.106971] br0: port 1(dummy0) entered blocking state
[ 1637.107012] br0: port 1(dummy0) entered disabled state
[ 1637.107045] dummy0: entered allmulticast mode
[ 1637.107098] dummy0: entered promiscuous mode
[ 1637.110017] br0: port 1(dummy0) entered blocking state
[ 1637.110081] br0: port 1(dummy0) entered forwarding state
[ 1637.310790] dummy0: left allmulticast mode
[ 1637.310818] dummy0: left promiscuous mode
[ 1637.310854] br0: port 1(dummy0) entered disabled state