[ 2033.307834][ T8142] br0: port 1(dummy0) entered blocking state
[ 2033.308022][ T8142] br0: port 1(dummy0) entered disabled state
[ 2033.308183][ T8142] dummy0: entered allmulticast mode
[ 2033.309696][ T8142] dummy0: entered promiscuous mode
[ 2033.339263][ T8143] br0: port 1(dummy0) entered blocking state
[ 2033.339543][ T8143] br0: port 1(dummy0) entered forwarding state
[ 2035.626630][   T12] dummy0: left allmulticast mode
[ 2035.626969][   T12] dummy0: left promiscuous mode
[ 2035.627216][   T12] br0: port 1(dummy0) entered disabled state