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Selecting the Method of Provisioning a Global IPv6 Address for the WAN Link

To assign a global IPv6 address to the WAN link of the CPE device, you can choose one of the methods described in Table 1.

Table 1: Choosing the Global IPv6 Address Provisioning Method for the WAN Link

NDRA Features	DHCPv6 IA_NA Features
Provides address autoconfiguration of the WAN link by means of router advertisements.	Provides a single IPv6/128 address to the WAN interface of the CPE by the BNG acting as a DHCPv6 server.
Supported on PPPoE access networks.	Supported on PPPoE and DHCP access networks.
Provides duplicate prefix prevention.	Provides the ability to use one DHCPv6 message to solicit both a global IPv6 address for the WAN link, and a prefix used to provision addresses on the subscriber LAN.
Use if the CPE does not support DHCP.	--