[ 1638.036263] br0: port 1(dummy0) entered blocking state
[ 1638.036336] br0: port 1(dummy0) entered disabled state
[ 1638.036407] dummy0: entered allmulticast mode
[ 1638.036491] dummy0: entered promiscuous mode
[ 1638.039416] br0: port 1(dummy0) entered blocking state
[ 1638.039446] br0: port 1(dummy0) entered forwarding state
[ 1638.241300] dummy0: left allmulticast mode
[ 1638.241333] dummy0: left promiscuous mode
[ 1638.241362] br0: port 1(dummy0) entered disabled state