User's Guide

• Announced DNS servers – add an IP address to the text box and click the ‘+’ button

to set the DNS server to be announced

• Announced DNS domains – add an IP address to the text box and click the ‘+’

button to set the DNS domain to be announced

From the OpenWRT manual:

OpenWrt features a versatile RA & DHCPv6 server and relay. Per default,

SLAAC (Stateless Address Autoconfiguration) and both stateless and stateful

DHCPv6 are enabled on an interface. If there are any prefixes of size /64 or

shorter present, then addresses will be handed out from each prefix. If all

addresses on an interface have prefixes shorter than /64 then DHCPv6 Prefix

Delegation is enabled for downstream routers. If a default route is present the

router advertises itself as default router on the interface.

The system is also able to detect when there is no prefix available from an

upstream interface and can switch into relaying mode automatically to extend

the upstream interface configuration onto its downstream interfaces. This is

useful for putting the target router behind another IPv6 router which doesn't

offer prefixes via DHCPv6-PD.

For more on IPv6 routing with OpenWRT, refer to:

https://openwrt.org/docs/guide-user/network/ipv6/start#router_advertisement_dhcpv6

Figure 73: Interfaces > DHCP Server > IPv6 Settings