5-2. Dynamic Host Configuration Protocol (DHCP) Version 6

• Cisco routers can provide DHCPv6 services for hosts.

• DHCPv6 provides dynamic allocation of host IP addressing and configuration parameters for network devices.

• DHCPv6 is a client/server model in which the server allocates and delivers addresses to DHCP clients.

• DHCPv6 can be configured to assign default gateway and DNS information.

• DHCPv6 can deliver either stateful and stateless information. With stateful configuration, address assignment is centrally managed, and clients do not use address autoconfiguration or neighbor discovery. With stateless DHCPv6, router advertisement (RA) messages are sent from a router that include one or more IPv6 prefixes that nodes can use; the lifetime information or each prefix; whether the router sending the advertisement should be used as a default router; and additional options such as the maximum transmission unit (MTU), hop limit, DNS servers, or domain search list options.