Dynamic Host Configuration Protocol Version 6 Concepts - NETGEAR M4200 Software Administration Manual

Dynamic Host Configuration Protocol Version 6 Concepts

Dynamic Host Configuration Protocol version 6 (DHCPv6) for IPv6 is used to assign IPv6
addresses statefully and distribute other configuration information such as domain name or
DNS server.
DHCPv6 supports stateful address allocation, prefix delegation, and stateless services. This
chapter describes how to configure the prefix delegation mode using a DHCPv6 pool. When
you create a DHCPv6 pool, you need to assign a prefix to the client DHCP unique identifier
(DUID).
DUID is used to identify the client's unique DUID value. The format is xx:xx:xx:xx:xx:xx.
RFC3315 defines three types:
• Link-layer address plus time:
- 00:01:hardware type:time:link-layer address
- Hardware type - 16 bit hardware type reserved by IANA. 1 means an Ethernet device.
- Time: 32-bit unsigned integer. The time in seconds when this DUID was generated
since 00:00:00 1/1/2000.
- Link-layer address - The link layer address of a device generating the DUID.
• Vendor-assigned unique ID based on Enterprise Number:
- 00:02:enterprise-number:identifier
- Enterprise-number - 32-bit integer reserved by IANA.
- Identifier - Variable length data for each vendor
• Link-layer address:
- 00:03:hardware type:link-layer address
- Hardware type - 16 bit hardware type reserved by IANA. 1 means an Ethernet device.
- Link-layer address - The link layer address of a device generating the DUID.
In the following case, the CPE router requests prefix from the PE router. The PE router
chooses prefix (2001:1::/64) for delegation, and responds with the prefix to the requesting
CPE router. The CPE router subnets the prefix and assigns the longer prefixes to links in the
user's network. The CPE router is then responsible to assign the 2001:1:1::/96 to one user's
network and 2001:1:2::/96 to another user's network.
Managed Switches
DHCPv6 Server
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