[ 1848.043268] br0: port 1(dummy0) entered blocking state
[ 1848.043313] br0: port 1(dummy0) entered disabled state
[ 1848.043354] dummy0: entered allmulticast mode
[ 1848.043404] dummy0: entered promiscuous mode
[ 1848.047032] br0: port 1(dummy0) entered blocking state
[ 1848.047098] br0: port 1(dummy0) entered forwarding state
[ 1848.308664] dummy0: left allmulticast mode
[ 1848.308747] dummy0: left promiscuous mode
[ 1848.308841] br0: port 1(dummy0) entered disabled state