[ 3185.153169] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 3185.209366] br0: port 1(dummy0) entered blocking state
[ 3185.210404] br0: port 1(dummy0) entered disabled state
[ 3185.211969] device dummy0 entered promiscuous mode
[ 3185.343387] br0: port 1(dummy0) entered blocking state
[ 3185.344390] br0: port 1(dummy0) entered forwarding state
[ 3185.345313] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready