[ 1877.514925][ T8956] br0: port 1(dummy0) entered blocking state
[ 1877.515178][ T8956] br0: port 1(dummy0) entered disabled state
[ 1877.515423][ T8956] dummy0: entered allmulticast mode
[ 1877.516553][ T8956] dummy0: entered promiscuous mode
[ 1877.537218][ T8957] br0: port 1(dummy0) entered blocking state
[ 1877.537479][ T8957] br0: port 1(dummy0) entered forwarding state
[ 1879.382740][   T12] dummy0: left allmulticast mode
[ 1879.383038][   T12] dummy0: left promiscuous mode
[ 1879.383257][   T12] br0: port 1(dummy0) entered disabled state