[ 2516.199702] br0: port 1(dummy0) entered blocking state [ 2516.199711] br0: port 1(dummy0) entered disabled state [ 2516.199832] device dummy0 entered promiscuous mode [ 2516.244781] br0: port 1(dummy0) entered blocking state [ 2516.244786] br0: port 1(dummy0) entered forwarding state [ 2516.244900] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready