i switched to a static ip for other reasons, now the only time i see this message is when i restart networkmanager or the like:
[ 11.058005] r8169 0000:0b:00.0 eth0: link up
[ 11.058013] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 11.137714] r8169 0000:0d:00.0 eth1: link up
[ 11.137723] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready
[ 11.167674] br0: port 1(eth1) entered blocking state
[ 11.167680] br0: port 1(eth1) entered disabled state
[ 11.167791] device eth1 entered promiscuous mode
[ 11.167845] br0: port 1(eth1) entered blocking state
[ 11.167847] br0: port 1(eth1) entered listening state
[ 26.841488] br0: port 1(eth1) entered learning state
[ 28.385554] NOHZ: local_softirq_pending 80
[ 28.385573] NOHZ: local_softirq_pending 80
[ 28.386200] NOHZ: local_softirq_pending 80
[ 42.201084] br0: port 1(eth1) entered forwarding state
[ 42.201086] br0: topology change detected, propagating
[ 42.201116] IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready