[ 2220.796028][ T8389] br0: port 1(dummy0) entered blocking state
[ 2220.796231][ T8389] br0: port 1(dummy0) entered disabled state
[ 2220.796408][ T8389] dummy0: entered allmulticast mode
[ 2220.797407][ T8389] dummy0: entered promiscuous mode
[ 2220.824322][ T8390] br0: port 1(dummy0) entered blocking state
[ 2220.824598][ T8390] br0: port 1(dummy0) entered forwarding state
[ 2222.864130][   T72] dummy0: left allmulticast mode
[ 2222.864412][   T72] dummy0: left promiscuous mode
[ 2222.864627][   T72] br0: port 1(dummy0) entered disabled state