Hello,
IPv6 was fully working on my router (ERL-3) with dhcpv6-pd. I also had ICMP working as well, but that suddenly stopped working as well without any known reason. I updated to 1.8.5, but IPv6 was still working just fine and ICMP broke. Now, IPv6 is not working at all.
Configuration: http://pastebin.com/raw/Ht3CamWu
Log: http://pastebin.com/raw/D2RNs2VN
I'm not sure if I'm missing something, or maybe made a small mistake that I keep glossing over. Any help would be appreciated.