Configuring an Address Assignment Mode

The address assignment modes supported by the NetEngine 8000 F include NDRA, DHCPv6 (IA_NA), DHCPv6 (IA_PD), DHCPv6 (IA_NA)+PD (IA_PD), and NDRA+DHCPv6 (IA_PD). Configure an address assignment mode based on networking requirements.

Context

If an IPv4 network is upgraded to an IPv6 network, the CPE working mode and authentication mode do not need to be changed unless there are special service requirements.
- Layer 3 users of a leased line obtain their addresses from the access router. The NetEngine 8000 F is in charge of only authentication and accounting, not address assignment.
In binding authentication mode, using DHCPv6 for address assignment is recommended.
In web authentication mode, using DHCPv6 for address assignment is recommended if user terminals support ND+PD.

Procedure

The address assignment mode varies according to CPE working modes. For details, see the following table.

CPE Working Mode	Scenario	IPv6 Address Configuration Mode
Bridging mode	A host initiates a connection request. The CPE transparently forwards the user request packet, and the NetEngine 8000 F assigns an IPv6 address to the host.	NDRA
Bridging mode		DHCPv6(IA_NA)
Unnumbered routing mode	The CPE initiates a connection request. After receiving the request, the NetEngine 8000 F assigns a prefix to the CPE to generate IPv6 addresses for hosts attached to the CPE.	DHCPv6(IA_PD)
Numbered routing mode	The CPE initiates a connection request. After receiving the request, the NetEngine 8000 F assigns an IPv6 address to the WAN interface on the CPE and a prefix to generate IPv6 addresses for hosts attached to the CPE.	DHCPv6(IA_NA)+PD(IA_PD)
Numbered routing mode		NDRA+DHCPv6(IA_PD)

(Optional) Configure the device to separately release PD addresses for IPoE users.
1. Run system-view
  The system view is displayed.
2. Run aaa
  The AAA view is displayed.
3. Run domain domain-name
  The AAA domain view is displayed.
4. Run ipv6 pd-address-release separate user-type ipoe
  The device is enabled to release only the assigned PD addresses in scenarios where CPEs work in numbered routing mode.
5. Run commit
  The configuration is committed.