IPv6-RA autoconfiguration method allows to autoconfigure ipv6-capable network interfaces by sending IPv6 prefixes throughout a link, so every node that understands its message format can derive its own IPv6 address based on internal algorithms. By using RA, you can configure almost any node to serve as a router (i.e. running RADVD). As a matter of fact, there are some flags in the RAs to set the DHCP as the "complement device" to get full information about the network. In cases when the only thing you need to know its a basic network configuration (routes), or if devices don't need to use another external services such as DNS, RA should me enough. On the other hand, DHCPv6 works in a way very similar like DHCPv4, and you can spread information like the DNS-servers for a given link or network. More advanced auto-configuration schemas may be reached if using RA+DHCPv6. Think on scenarios like mobile networks, multihommed hosts and low-power consuption ip based network-based networks. BR. -- Daniel Espejel Pérez