[  252.404999] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[  252.454414] br0: port 1(dummy0) entered blocking state
[  252.455163] br0: port 1(dummy0) entered disabled state
[  252.456051] device dummy0 entered promiscuous mode
[  252.561366] br0: port 1(dummy0) entered blocking state
[  252.562104] br0: port 1(dummy0) entered forwarding state
[  252.562890] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready