I started with these instructions:
https://docs.opnsense.org/manual/dnsmasq.html#dhcpv4-with-dns-registration (https://docs.opnsense.org/manual/dnsmasq.html#dhcpv4-with-dns-registration)
I ran into a problem where defining a DHCP pool that included dynamic and reserved assignments (a requirement of the DNSMasq DHCP servers) did not successfully allow (some maybe all) unused addresses in the reserved range to declared "static" (advanced option) if they were not subject of a reserved assignment to prevent automatic assignment of undesirable addresses. I entered each "static" entry as a single address as the window indicated was required. This problem was present in both IPv4 and IPv6 DHCP Dynamic assignments.
I switched to using DNSmasq as a local DNS server and Kea as the IPv4 & IPv6 DHCP server. I have successfully gotten all addresses (and not all suffixes) assigned as desired. Kea only includes the dynamic assigned addresses in the pool and both static and reserved assignments are made from outside the dynamic pool addresses per the Kea documention.
I have been working on getting a DNS suffix assigned to dynamic pool and reserved assignments.
The KEA IPv4 DHCP server has a field in the pool setup to contain that DNS Suffix value along with a DNS Search suffix value. This works for me.
IPv4 and IPv6 reserved addresses seem to work fine if the full FQDN including trailing period is included in the Hostname of the reservation entry The DNS Suffix value in the reserve configuration was not sufficient to be appended to Hostname (without the suffix) in my testing.
The IPv6 DHCP server DOES NOT have a DNS Suffix value and only has a DNS Search Suffix in the dynamic pool configuration window.
I tried without any real hope of success (no documentation indicated this would work) putting both suffixes in the DHCPv6 Server DNS Search Suffix (the DNS Suffix value first). No surprise it did not work.
I also found under advanced DHCPv6 pool values a V6-DNR entry. The help references finding the format of this value in the Kea Documentation. I have tried several entries the last being "1 {DNS Suffix} ::1 port=53053" (DNSMasq is the local dns server running on the router using port 53053). That entry did not generate an error in the Kea DHCP log file. However, my IPv6 dynamic assignments are not getting the DNS Suffix assigned in the DHCPv6 Leases window or according to my queries of the DNS server.
Is my V6-DNR entry coded incorrectly? Is there somewhere else to specify the DNS Suffix for the IPv6 Dynamic Pool that I have not found?
Thanks; if anyone can provide some insight as to what I am doing wrong.