[ 2575.447225] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 2575.518717] br0: port 1(dummy0) entered blocking state
[ 2575.519403] br0: port 1(dummy0) entered disabled state
[ 2575.520651] device dummy0 entered promiscuous mode
[ 2575.681720] br0: port 1(dummy0) entered blocking state
[ 2575.682405] br0: port 1(dummy0) entered forwarding state
[ 2575.683091] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready