[  312.564848] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[  312.621149] br0: port 1(dummy0) entered blocking state
[  312.626282] br0: port 1(dummy0) entered disabled state
[  312.631593] device dummy0 entered promiscuous mode
[  312.725816] br0: port 1(dummy0) entered blocking state
[  312.730959] br0: port 1(dummy0) entered forwarding state
[  312.736380] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready