[ 1874.804525][ T6546] br0: port 1(dummy0) entered blocking state
[ 1874.804775][ T6546] br0: port 1(dummy0) entered disabled state
[ 1874.805006][ T6546] dummy0: entered allmulticast mode
[ 1874.805984][ T6546] dummy0: entered promiscuous mode
[ 1874.831483][ T6547] br0: port 1(dummy0) entered blocking state
[ 1874.831669][ T6547] br0: port 1(dummy0) entered forwarding state
[ 1876.593202][   T68] dummy0: left allmulticast mode
[ 1876.593368][   T68] dummy0: left promiscuous mode
[ 1876.593579][   T68] br0: port 1(dummy0) entered disabled state