[ 1720.936713] br0: port 1(dummy0) entered blocking state
[ 1720.936761] br0: port 1(dummy0) entered disabled state
[ 1720.936791] dummy0: entered allmulticast mode
[ 1720.936841] dummy0: entered promiscuous mode
[ 1720.939650] br0: port 1(dummy0) entered blocking state
[ 1720.939722] br0: port 1(dummy0) entered forwarding state
[ 1721.128400] dummy0: left allmulticast mode
[ 1721.128443] dummy0: left promiscuous mode
[ 1721.128473] br0: port 1(dummy0) entered disabled state