[ 2182.436080][ T4554] br0: port 1(dummy0) entered blocking state
[ 2182.436392][ T4554] br0: port 1(dummy0) entered disabled state
[ 2182.436671][ T4554] dummy0: entered allmulticast mode
[ 2182.438085][ T4554] dummy0: entered promiscuous mode
[ 2182.469595][ T4555] br0: port 1(dummy0) entered blocking state
[ 2182.470172][ T4555] br0: port 1(dummy0) entered forwarding state
[ 2184.922017][   T12] dummy0: left allmulticast mode
[ 2184.922830][   T12] dummy0: left promiscuous mode
[ 2184.923503][   T12] br0: port 1(dummy0) entered disabled state