[ 1720.148815] br0: port 1(dummy0) entered blocking state
[ 1720.148886] br0: port 1(dummy0) entered disabled state
[ 1720.148940] dummy0: entered allmulticast mode
[ 1720.149014] dummy0: entered promiscuous mode
[ 1720.152375] br0: port 1(dummy0) entered blocking state
[ 1720.152400] br0: port 1(dummy0) entered forwarding state
[ 1720.388187] dummy0: left allmulticast mode
[ 1720.388223] dummy0: left promiscuous mode
[ 1720.388245] br0: port 1(dummy0) entered disabled state