IPv6 Flow Label Specification
RFC 6437
Document | Type |
RFC - Proposed Standard
(November 2011; No errata)
Obsoletes RFC 3697
|
|
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Authors | Shane Amante , Jarno Rajahalme , Brian Carpenter , Sheng Jiang | ||
Last updated | 2018-12-20 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | WG Document | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 6437 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Jari Arkko | ||
IESG note | Brian Haberman (brian@innovationslab.net) is the document shepherd for this document. | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) S. Amante Request for Comments: 6437 Level 3 Obsoletes: 3697 B. Carpenter Updates: 2205, 2460 Univ. of Auckland Category: Standards Track S. Jiang ISSN: 2070-1721 Huawei J. Rajahalme Nokia Siemens Networks November 2011 IPv6 Flow Label Specification Abstract This document specifies the IPv6 Flow Label field and the minimum requirements for IPv6 nodes labeling flows, IPv6 nodes forwarding labeled packets, and flow state establishment methods. Even when mentioned as examples of possible uses of the flow labeling, more detailed requirements for specific use cases are out of the scope for this document. The usage of the Flow Label field enables efficient IPv6 flow classification based only on IPv6 main header fields in fixed positions. Status of This Memo This is an Internet Standards Track document. This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741. Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc6437. Amante, et al. Standards Track [Page 1] RFC 6437 IPv6 Flow Label Specification November 2011 Copyright Notice Copyright (c) 2011 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. IPv6 Flow Label Specification . . . . . . . . . . . . . . . . 4 3. Flow Labeling Requirements in the Stateless Scenario . . . . . 5 4. Flow State Establishment Requirements . . . . . . . . . . . . 7 5. Essential Correction to RFC 2205 . . . . . . . . . . . . . . . 7 6. Security Considerations . . . . . . . . . . . . . . . . . . . 7 6.1. Covert Channel Risk . . . . . . . . . . . . . . . . . . . 8 6.2. Theft and Denial of Service . . . . . . . . . . . . . . . 8 6.3. IPsec and Tunneling Interactions . . . . . . . . . . . . . 10 6.4. Security Filtering Interactions . . . . . . . . . . . . . 11 7. Differences from RFC 3697 . . . . . . . . . . . . . . . . . . 11 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 11 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 12 9.1. Normative References . . . . . . . . . . . . . . . . . . . 12 9.2. Informative References . . . . . . . . . . . . . . . . . . 12 Appendix A. Example 20-Bit Hash Function . . . . . . . . . . . . 14 Amante, et al. Standards Track [Page 2] RFC 6437 IPv6 Flow Label Specification November 2011 1. Introduction From the viewpoint of the network layer, a flow is a sequence of packets sent from a particular source to a particular unicast, anycast, or multicast destination that a node desires to label as a flow. From an upper-layer viewpoint, a flow could consist of allShow full document text