I've whittled back my IPv6 configuration to just use the HE tunnel that I have. It works wonderfully so I can't imagine there is a configuration issue specific to that tunnel that is causing the RAs to stop.
Another interesting symptom is that the OpenWRT router doesn't seem to respond to neighbor discovery until I log into it and run a tcpdump on the LAN interface. So that is, I ping the router's ULA address from a node in the network and nothing comes back from the ping, but as soon as I log into the router and run a "tcpdump -i br-lan" the router starts responding to the ping. I wonder if that sheds any more light? Cheers, b.
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