[ 2133.480630][ T4293] br0: port 1(dummy0) entered blocking state
[ 2133.480827][ T4293] br0: port 1(dummy0) entered disabled state
[ 2133.480991][ T4293] dummy0: entered allmulticast mode
[ 2133.482237][ T4293] dummy0: entered promiscuous mode
[ 2133.520227][ T4294] br0: port 1(dummy0) entered blocking state
[ 2133.520550][ T4294] br0: port 1(dummy0) entered forwarding state
[ 2135.503706][   T12] dummy0: left allmulticast mode
[ 2135.504632][   T12] dummy0: left promiscuous mode
[ 2135.504882][   T12] br0: port 1(dummy0) entered disabled state