[ 1975.611058][ T8492] br0: port 1(dummy0) entered blocking state
[ 1975.611285][ T8492] br0: port 1(dummy0) entered disabled state
[ 1975.611503][ T8492] dummy0: entered allmulticast mode
[ 1975.612457][ T8492] dummy0: entered promiscuous mode
[ 1975.634996][ T8493] br0: port 1(dummy0) entered blocking state
[ 1975.635354][ T8493] br0: port 1(dummy0) entered forwarding state
[ 1977.598501][   T12] dummy0: left allmulticast mode
[ 1977.599426][   T12] dummy0: left promiscuous mode
[ 1977.599692][   T12] br0: port 1(dummy0) entered disabled state