is there a way to determine if a switch does this (say by swconfig)? can it be turned off?
I've had this problem. I don't consider log spamming benign even if the other functionality of the AP is not affected by it.
There does not seem to be a unique workaround for this issue... See here, and, for my workaround, here. My workaround to delete the ipv6 lla's, while still working for me, does not work for others.