[ 3639.019602] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 3639.079551] br0: port 1(dummy0) entered blocking state
[ 3639.079565] br0: port 1(dummy0) entered disabled state
[ 3639.079652] device dummy0 entered promiscuous mode
[ 3639.196823] br0: port 1(dummy0) entered blocking state
[ 3639.196837] br0: port 1(dummy0) entered forwarding state
[ 3639.196886] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready