Hi. Here's what I've found so far. https://askubuntu.com/questions/460405/ipv6-does-not-work-over-bridge
This answer suggests that it's IGMP snooping *not* STP that is the problem. That makes a lot more sense to me, and has an obvious fix: * Either disable IGMP snooping or * Enable an IGMP querier. I even have a great setup for testing this back in Boston. Unfortunately I won't be there until April, and I'm not having much luck finding a system I have administrative control on that's behind a wireless router that does do IPv6 on a ISP that does IPv6. I've got a couple systems where to do v6 you'd need to use DHCPv6, but that's a different set of issues. --Sam
