[ 1631.550318] br0: port 1(dummy0) entered blocking state
[ 1631.550366] br0: port 1(dummy0) entered disabled state
[ 1631.550399] dummy0: entered allmulticast mode
[ 1631.550451] dummy0: entered promiscuous mode
[ 1631.553346] br0: port 1(dummy0) entered blocking state
[ 1631.553419] br0: port 1(dummy0) entered forwarding state
[ 1631.757566] dummy0: left allmulticast mode
[ 1631.757603] dummy0: left promiscuous mode
[ 1631.757631] br0: port 1(dummy0) entered disabled state