RFC 9928 - DHCPv4 over DHCPv6 with Relay Agent Support

• Status: Proposed Standard
• Published: March 2026
• Stream: IETF
• Errata: No Errata

Abstract

RFC 9928 describes how a Relay Agent can perform DHCPv4-over-DHCPv6 encapsulation and decapsulation on behalf of legacy IPv4-only clients. It extends the RFC 7341 deployment model without requiring changes to the DHCPv4 client.

Contents

• 1. Introduction
• 2. Conventions and Definitions
• 3. DHCPv4-over-DHCPv6 Relay Agent (4o6RA)
• 4. Deployment Considerations
• 5. Security Considerations
• 6. IANA Considerations
• 7. References
• Appendix A. Topology Discovery Use Case
• Acknowledgments
• Authors' Addresses

Related Resources

• Official Text: RFC 9928
• Official Page: RFC 9928 DataTracker
• Errata: RFC Editor Errata