[ 1857.346400][ T4542] br0: port 1(dummy0) entered blocking state
[ 1857.347000][ T4542] br0: port 1(dummy0) entered disabled state
[ 1857.347173][ T4542] dummy0: entered allmulticast mode
[ 1857.348415][ T4542] dummy0: entered promiscuous mode
[ 1857.373348][ T4543] br0: port 1(dummy0) entered blocking state
[ 1857.373695][ T4543] br0: port 1(dummy0) entered forwarding state
[ 1859.340708][   T12] dummy0: left allmulticast mode
[ 1859.342487][   T12] dummy0: left promiscuous mode
[ 1859.342767][   T12] br0: port 1(dummy0) entered disabled state