Subject: [dhcwg] Delegating IPv4 addresses with DHCPv6 Prefix Delegation

From: "Templin, Fred L" <[email-masked]>
Date: Fri, 10 Apr 2015 23:11:46 +0000

Hi,

AERO is doing something with ordinary DHCPv6 Prefix Delegation that this group
might find interesting. Client nodes that need to configure an IPv4 address use
DHCPv6 Prefix Delegation to receive an IPv4-Mapped IPv6 prefix. The client
contacts the DHCPv6 server via tunneling over an IPv6 network. The delegated
prefix is of the form:

    ::FFFF:192.0.2.1/128

When the client receives the delegated prefix from the server, it assigns the IPv4
address (i.e., 192.0.2.1) to a virtual interface. The client can then use the address
for IPv4-in-IPv6 tunneling.

Note that this requires no new DHCPv6 messages, nor any carriage of DHCPv4
messages. The spec is here:

https://datatracker.ietf.org/doc/draft-templin-aerolink/

Comments?

Thanks - Fred
[email-masked]