Routers advertise their presence along with various link and Internet parameters either periodically or in response to a router solicitation message. Router advertisements contain prefixes that are used for various reasons, such as on-link determination, address configuration, and suggested hop-limit value. Router advertisements also allow routers to inform hosts on how to perform address auto-configuration. For example, routers can specify whether hosts should use stateful (DHCPv6) or autonomous (stateless) address configuration.
This procedure shows how to configure router advertisement parameters: