[ 3745.759988] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 3745.828427] br0: port 1(veth1) entered blocking state
[ 3745.828450] br0: port 1(veth1) entered disabled state
[ 3745.828600] device veth1 entered promiscuous mode
[ 3745.828901] br0: port 1(veth1) entered blocking state
[ 3745.828911] br0: port 1(veth1) entered forwarding state
[ 3745.829337] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready
[ 3745.829584] br0: port 1(veth1) entered disabled state
[ 3745.846809] br0: port 2(veth3) entered blocking state
[ 3745.846825] br0: port 2(veth3) entered disabled state
[ 3745.846948] device veth3 entered promiscuous mode
[ 3745.995162] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
[ 3745.995201] br0: port 1(veth1) entered blocking state
[ 3745.995210] br0: port 1(veth1) entered forwarding state
[ 3746.157286] IPv6: ADDRCONF(NETDEV_CHANGE): veth3: link becomes ready
[ 3746.157318] br0: port 2(veth3) entered blocking state
[ 3746.157325] br0: port 2(veth3) entered forwarding state
[ 3754.880404] device veth0 entered promiscuous mode
[ 3755.309299] device veth2 entered promiscuous mode
[ 3889.397589] br0: port 1(veth1) entered disabled state
[ 3889.557412] br0: port 2(veth3) entered disabled state
[ 3889.646379] device veth1 left promiscuous mode
[ 3889.646419] br0: port 1(veth1) entered disabled state
[ 3889.678857] device veth3 left promiscuous mode
[ 3889.678884] br0: port 2(veth3) entered disabled state