[ 2488.561938] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 2488.621188] br0: port 1(dummy0) entered blocking state
[ 2488.621759] br0: port 1(dummy0) entered disabled state
[ 2488.622681] device dummy0 entered promiscuous mode
[ 2488.740710] br0: port 1(dummy0) entered blocking state
[ 2488.741290] br0: port 1(dummy0) entered forwarding state
[ 2488.741899] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready