[  436.907874] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[  436.970198] br0: port 1(dummy0) entered blocking state
[  436.975336] br0: port 1(dummy0) entered disabled state
[  436.980723] device dummy0 entered promiscuous mode
[  437.080195] br0: port 1(dummy0) entered blocking state
[  437.085329] br0: port 1(dummy0) entered forwarding state
[  437.090834] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready