Configure IPv6 DNS address for DHCP to send to clients


I am trying to setup the DHCP server to propagate in IPv6 DNS server to send to clients that isn't LEDE itselft, I am running Pi-Hole on this server for adblocking.
I have tried adding the address In the LuCI GUI, under Network - Interfaces - LAN - DHCP-Options set “6,xxxx:xxxx:xxxx:xxxx::xxxx” but this doesn't work, it seems it's only for IPv4 addresses. I do not however that LEDE does send its own IPv6 DNS address to clients, I am looking to setup this for an alternate DNS server.
I haven't been able to find much when searching other than a bunch of ways of setting up an alternate IPv4 DNS server.

Thank you for the help.

I'm in the same situation, and that field won't work 'cause it's specific to IPv4.

OpenWRT 18.06.1 does have an IPv6 settings tab in there which has an "announced DNS servers" box but since my hosts are running SLAAC, the DHCPv6 service is disabled.

Did you ever manage to get your setup to work?

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Wow! "no comment" here. Can this not be done? I am in the same situation ...

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