DHCPv4 over DHCPv6 with Relay Agent Support
RFC 9928, “DHCPv4 over DHCPv6 with Relay Agent Support”, is a Proposed Standard document published in March 2026 by C. Porfiri, S. Krishnan, J. Arkko, M. Kühlewind. The canonical text is published by the RFC Editor.
Abstract
This document describes a mechanism for networks with legacy IPv4-only clients to use services provided by DHCPv4 over DHCPv6 in a Relay Agent. RFC 7341 specifies the use of DHCPv4 over DHCPv6 in the client only. This document specifies an approach based on RFC 7341 that allows a Relay Agent to implement the DHCPv4-over-DHCPv6 encapsulation and decapsulation of DHCPv4 messages in DHCPv6 messages on behalf of a DHCPv4 client.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 9928 is hosted at rfc-editor.org. Available in HTML,TXT,PDF,XML.
- RFC 9927 Fixing the C-Flag in the Extended Address Registration Option
- RFC 9929 IGP Unreachable Prefix Announcement
- RFC 9926 Prefix Registration for IPv6 Neighbor Discovery
- RFC 9930 Tunnel Extensible Authentication Protocol Version 1
- RFC 9925 Unsigned X.509 Certificates
- RFC 9931 Security Considerations for Optimistic Protocol Transitions in HTTP/1.1
- RFC 9924 Advanced Professional Video
- RFC 9932 Mutually Authenticating TLS in the Context of Federations