[ 1643.645305][ T5923] br0: port 1(dummy0) entered blocking state
[ 1643.645439][ T5923] br0: port 1(dummy0) entered disabled state
[ 1643.645549][ T5923] dummy0: entered allmulticast mode
[ 1643.646047][ T5923] dummy0: entered promiscuous mode
[ 1643.667299][ T5924] br0: port 1(dummy0) entered blocking state
[ 1643.667451][ T5924] br0: port 1(dummy0) entered forwarding state
[ 1644.876792][   T12] dummy0: left allmulticast mode
[ 1644.877056][   T12] dummy0: left promiscuous mode
[ 1644.877214][   T12] br0: port 1(dummy0) entered disabled state