Internet-Draft GIP6 for QUIC January 2024
Li, et al. Expires 14 July 2024 [Page]
Intended Status:
Standards Track
Z. Li
S. Chen
H. Shi

Generalized IPv6 Tunnel for QUIC


This document defines a new encapsulation method for QUIC packet transmission based on IPv6 extension headers. This method enables QUIC packet transmission to easily inherit the extended functions of IPv6.

Status of This Memo

This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79.

Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet-Drafts is at

Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress."

This Internet-Draft will expire on 14 July 2024.

Table of Contents

1. Introduction

[] proposes the Generalize IPv6 Tunnel to unify the IP tunnels and remove duplicate functions and support new features. QUIC, as a general-purpose transport layer network protocol, is gradually being applied on the network side, such as DNS over QUIC [RFC9250] and QUIC tunnel [I-D.piraux-quic-tunnel]. QUIC tunnel-based packet transmission also faces the issue of being extended to support new features.

This document defines encapsulation of QUIC headers into the GIP6 tunnel encapsulation and attempts to solve these issues.

2. Terminology

2.1. Requirements Language

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here.

3. Problem Statement

As mentioned in the draft [], many new features, such as Alternate Marking [I-D.ietf-6man-ipv6-alt-mark], IOAM [I-D.ietf-ippm-ioam-ipv6-options], resource isolation [I-D.ietf-6man-enhanced-vpn-vtn-id] , and APN [], are emerging and the corresponding encapsulations over the IPv6 are defined. Since there are all kinds of existing IP tunnels (including UDP-based tunnels), if these new features need to be supported over these tunnels, it is very difficult to extend for these tunnels. If QUIC is used as a tunnel for transmission of data packets in the network, it will also face the challenge to support these new features.

4. Encapsulation of GIP6 for QUIC

[] defined the GIP6 tunnel which uses the IPv6 header and IPv6 extension header to support both functions of existing IP tunnels and new features. The GIP6 tunnel unifies the IP tunnels which removes the duplicate functions and supports new features. This can greatly reduce the repeated effort to extend the exiting IP tunnels to support the new features.

To support existing QUIC functions, the GIP6 tunnel is extended as follows:

  1. Definition of the QUIC Option: A new option called QUIC Option is defined to carry the QUIC header information. The QUIC Option MUST only be encapsulated in the Destination Options Header (DOH). The format of the QUIC option is shown in Figure 1:

  2. The function of the UDP header for ECMP can replaced by the flow label of the IPv6 header in the GIP6 tunnel. To ensure compatibility, the value of the flow label calculated for the purpose of ECMP SHOULD be the same as that of the source port of the UDP.

0                   1                   2                   3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
                              |  Option Type  |  Opt Data Len |
|                                                             |
|                QUIC Header (Variable Bytes)                 |
Figure 1: QUIC option header


5. Security Considerations

This document does not introduce any new security considerations.

6. IANA Considerations

The Option Type should be assigned in IANA's "Destination Options" registry.

This draft requests the following IPv6 Option Type assignment from the Destination Options sub-registry of Internet Protocol Version 6 (IPv6) Parameters.

Hex Value     Binary Value        Description           Reference
             act  chg  rest
 TBD         00    0   TBD          QUIC               [This draft]

7. References

7.1. Normative References

Huitema, C., Dickinson, S., and A. Mankin, "DNS over Dedicated QUIC Connections", RFC 9250, DOI 10.17487/RFC9250, , <>.
Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, , <>.
Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, , <>.
Thomson, M., "Version-Independent Properties of QUIC", RFC 8999, DOI 10.17487/RFC8999, , <>.

7.2. Informative References

Li, Z., Chen, S., Gao, Q., Zhang, S., and Q. Xu, "Generalized IPv6 Tunnel (GIP6)", Work in Progress, Internet-Draft, draft-li-rtgwg-generalized-ipv6-tunnel-03, , <>.
Piraux, M., Bonaventure, O., and A. Masputra, "Tunneling Internet protocols inside QUIC", Work in Progress, Internet-Draft, draft-piraux-quic-tunnel-03, , <>.
Fioccola, G., Zhou, T., Cociglio, M., Qin, F., and R. Pang, "IPv6 Application of the Alternate-Marking Method", Work in Progress, Internet-Draft, draft-ietf-6man-ipv6-alt-mark-17, , <>.
Bhandari, S. and F. Brockners, "IPv6 Options for In Situ Operations, Administration, and Maintenance (IOAM)", Work in Progress, Internet-Draft, draft-ietf-ippm-ioam-ipv6-options-12, , <>.
Dong, J., Li, Z., Xie, C., Ma, C., and G. S. Mishra, "Carrying Virtual Transport Network (VTN) Information in IPv6 Extension Header", Work in Progress, Internet-Draft, draft-ietf-6man-enhanced-vpn-vtn-id-05, , <>.
Li, Z., Peng, S., and C. Xie, "Application-aware IPv6 Networking (APN6) Encapsulation", Work in Progress, Internet-Draft, draft-li-apn-ipv6-encap-07, , <>.

Authors' Addresses

Zhenbin Li
Beiqing Road
Shuanglong Chen
Beiqing Road
Hang Shi
Beiqing Road