[ 3849.438802] bridge: filtering via arp/ip/ip6tables is no longer available by default. Update your scripts to load br_netfilter if you need this.
[ 3849.508375] br0: port 1(veth1) entered blocking state
[ 3849.508397] br0: port 1(veth1) entered disabled state
[ 3849.508522] device veth1 entered promiscuous mode
[ 3849.508644] br0: port 1(veth1) entered blocking state
[ 3849.508655] br0: port 1(veth1) entered forwarding state
[ 3849.508717] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready
[ 3849.511531] br0: port 1(veth1) entered disabled state
[ 3849.512278] br0: port 2(veth3) entered blocking state
[ 3849.512288] br0: port 2(veth3) entered disabled state
[ 3849.517459] device veth3 entered promiscuous mode
[ 3849.668225] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready
[ 3849.668261] br0: port 1(veth1) entered blocking state
[ 3849.668267] br0: port 1(veth1) entered forwarding state
[ 3849.790176] IPv6: ADDRCONF(NETDEV_CHANGE): veth3: link becomes ready
[ 3849.790209] br0: port 2(veth3) entered blocking state
[ 3849.790215] br0: port 2(veth3) entered forwarding state
[ 3858.512273] device veth0 entered promiscuous mode
[ 3859.038360] device veth2 entered promiscuous mode
[ 3993.115301] br0: port 1(veth1) entered disabled state
[ 3993.241007] br0: port 2(veth3) entered disabled state
[ 3993.318327] device veth1 left promiscuous mode
[ 3993.318363] br0: port 1(veth1) entered disabled state
[ 3993.392762] device veth3 left promiscuous mode
[ 3993.392800] br0: port 2(veth3) entered disabled state