Worth Reading: IPv6 flags and DNS configuration

One of the several capabilities provided by IPv6 is that hosts are provided two options to configure their IPv6 addressles) and other parameters like the Recursive DNS Server(RDNSS) information [2]; that is either by using the stateless address autoconfiguration [3] or by obtaining the information from aDHCPv6server(4]. IPv6 hosts are advised as for the environment options by some specific flags included in the Router Advertisement (RAI messages sent by the local router(s). —ENRW (PDF)