[ 2451.347730] br0: port 1(dummy0) entered blocking state [ 2451.347738] br0: port 1(dummy0) entered disabled state [ 2451.347799] device dummy0 entered promiscuous mode [ 2451.391830] br0: port 1(dummy0) entered blocking state [ 2451.391836] br0: port 1(dummy0) entered forwarding state [ 2451.391879] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready