When a host on a given VLAN is configured to acquire configuration settings from a DHCPv6 server, it transmits a DHCPv6 request on the VLAN. If there is no DHCPv6 server on the VLAN, you can route the host request to a server on another VLAN by enabling a DHCPv6-relay on the routing switch and configuring a Helper address on the VLAN.

The settings in the managed–config–flag and other–config–flag RA options override an enabled DHCPv6 option in a host on the VLAN. For more information on DHCPv6-relay, see DHCPv6-Relay. For information on enabling DHCPv6 requests on a host, see Enabling DHCPv6.