As a lift from dnsmasq behavior, allow the dns option to configure to the prefixes on the interface. If its [::] it will use the GA of the router, if its [fd00::] it will use the ULA, if its [fe80::] also as default, and just host ID parts append to all prefixes such as [::53]. The later to direct to a standalone server.
IPV6 prefixes can shift at your ISP will, and setting a static dns option for odhcpd for either "this router" or "device ::53" is not self sustaining. Also the link addresses are really for lower level network management, and application levels should be GA or ULA.
As a lift from dnsmasq behavior, allow the
dnsoption to configure to the prefixes on the interface. If its[::]it will use the GA of the router, if its[fd00::]it will use the ULA, if its[fe80::]also as default, and just host ID parts append to all prefixes such as[::53]. The later to direct to a standalone server.IPV6 prefixes can shift at your ISP will, and setting a static
dnsoption for odhcpd for either "this router" or "device ::53" is not self sustaining. Also the link addresses are really for lower level network management, and application levels should be GA or ULA.