[ 2302.625545][ T9553] br0: port 1(dummy0) entered blocking state
[ 2302.625853][ T9553] br0: port 1(dummy0) entered disabled state
[ 2302.626135][ T9553] dummy0: entered allmulticast mode
[ 2302.627831][ T9553] dummy0: entered promiscuous mode
[ 2302.654086][ T9554] br0: port 1(dummy0) entered blocking state
[ 2302.654665][ T9554] br0: port 1(dummy0) entered forwarding state
[ 2305.149399][   T12] dummy0: left allmulticast mode
[ 2305.150444][   T12] dummy0: left promiscuous mode
[ 2305.150801][   T12] br0: port 1(dummy0) entered disabled state