[ 2218.314876] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 2218.377521] br0: port 1(dummy0) entered blocking state
[ 2218.382664] br0: port 1(dummy0) entered disabled state
[ 2218.388058] device dummy0 entered promiscuous mode
[ 2218.487067] br0: port 1(dummy0) entered blocking state
[ 2218.492216] br0: port 1(dummy0) entered forwarding state
[ 2218.497698] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready