IPB138: Making Sense Of DHCPv6 Prefix Delegation (DHCPv6-PD)

DHCPv6 Prefix Delegation (DHCPv6-PD) is an IETF RFC that lets one router delegate a long-lived prefix, using DHCP, to a requesting router. What’s the need for this? As the RFC notes, some applications expect stable addresses. It also notes: It is appropriate for situations in which the delegating router does not have knowledge about the topology of the networks to which the requesting router is attached, and the delegating router does not require other information aside from the identity of the requesting router to choose a prefix for delegation. For example, these options would be used by a service provider to assign a prefix to a Customer Premise Equipment (CPE) device acting as a router between the subscriber’s internal network and the service provider’s core network. In this episode Ed, Scott, and Tom explore DHCPv6 Prefix Delegation (DHCPv6-PD), what it does, and some of its use-cases in both service provider and enterprise environments. Topics discussed include: * How DHCPv6-PD is used today * DHCPv6-PD in the enterprise * Potential impacts to IPv6 address allocation and planning Thanks for listening! Sponsor: Gcore Gcore is a next-generation content delivery network that accelerates your application’s static and dynamic content. Gcore CDN has you covered around the globe with more than150 edge locations and 11,000 peering partners worldwide. And of course, Gcore CDN supports IPv4 and IPv6. Go to Gcore.com/packetpushers to find out more. Show Links: IPv6 Prefix Options for Dynamic Host Configuration Protocol (DHCP) version 6 – IETF DHCPv6 Prefix Delegating Relay Requirements – IETF RIPE document #690 provides advice to operators on prefix sizes to provide subscribers – RIPE IPv6 Buzz 042: Why Wireless Is A Smart Place To Start With IPv6 – Packet Pushers Unique IPv6 Prefix per Host (RFC 8273) – IETF