[ 2371.856483][ T4620] br0: port 1(dummy0) entered blocking state
[ 2371.856790][ T4620] br0: port 1(dummy0) entered disabled state
[ 2371.857080][ T4620] dummy0: entered allmulticast mode
[ 2371.858251][ T4620] dummy0: entered promiscuous mode
[ 2371.895647][ T4621] br0: port 1(dummy0) entered blocking state
[ 2371.896196][ T4621] br0: port 1(dummy0) entered forwarding state
[ 2374.362816][   T71] dummy0: left allmulticast mode
[ 2374.364018][   T71] dummy0: left promiscuous mode
[ 2374.364584][   T71] br0: port 1(dummy0) entered disabled state