I'm trying to configure IPv6 address on my router. My ISP supports DHCPv6 and provides a PD. On the main interface 'wan', when I set "Obtain IPv6 Address" to "Auto", no address is obtained. When it is set to "Manual" I'm able to obtain IPv6 address on the interface 'wan6' along with a PD but it is unusable by the router and devices on LAN (the 'wan6' interface uses the 'wan' device but 'wan' interface uses the 'pppoe-wan' tunnel interface). When I change the device of 'wan6' interface to pppoe-wan, there is no IPv6 connectivity at all.
Issue resolved after re-installing OpenWrt.
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