[ 2481.569945] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 2481.593049] br0: port 1(dummy0) entered blocking state
[ 2481.593054] br0: port 1(dummy0) entered disabled state
[ 2481.593150] device dummy0 entered promiscuous mode
[ 2481.641886] br0: port 1(dummy0) entered blocking state
[ 2481.641896] br0: port 1(dummy0) entered forwarding state
[ 2481.641938] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready