[ 2435.067747] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 2435.086758] br0: port 1(dummy0) entered blocking state
[ 2435.086760] br0: port 1(dummy0) entered disabled state
[ 2435.086807] device dummy0 entered promiscuous mode
[ 2435.124891] br0: port 1(dummy0) entered blocking state
[ 2435.124895] br0: port 1(dummy0) entered forwarding state
[ 2435.124919] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready