[ 2754.803968] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 2754.843645] br0: port 1(veth1) entered blocking state
[ 2754.844285] br0: port 1(veth1) entered disabled state
[ 2754.846659] device veth1 entered promiscuous mode
[ 2754.847303] br0: port 1(veth1) entered blocking state
[ 2754.847944] br0: port 1(veth1) entered forwarding state
[ 2754.848607] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready
[ 2754.849402] br0: port 1(veth1) entered disabled state
[ 2754.856051] br0: port 2(veth3) entered blocking state
[ 2754.856715] br0: port 2(veth3) entered disabled state
[ 2754.859658] device veth3 entered promiscuous mode
[ 2754.893980] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
[ 2754.894831] br0: port 1(veth1) entered blocking state
[ 2754.895419] br0: port 1(veth1) entered forwarding state
[ 2754.949666] IPv6: ADDRCONF(NETDEV_CHANGE): veth3: link becomes ready
[ 2754.950609] br0: port 2(veth3) entered blocking state
[ 2754.951218] br0: port 2(veth3) entered forwarding state
[ 2763.574031] device veth0 entered promiscuous mode
[ 2763.954215] device veth2 entered promiscuous mode
[ 2897.721511] br0: port 1(veth1) entered disabled state
[ 2897.735505] br0: port 2(veth3) entered disabled state
[ 2897.757901] device veth1 left promiscuous mode
[ 2897.758549] br0: port 1(veth1) entered disabled state
[ 2897.765737] device veth3 left promiscuous mode
[ 2897.766364] br0: port 2(veth3) entered disabled state