IPv6 Destination Option for Congestion Exposure (ConEx)
RFC 7837
Document | Type | RFC - Experimental (May 2016; No errata) | |
---|---|---|---|
Authors | Suresh Krishnan , Mirja Kühlewind , Bob Briscoe , Carlos Ucendo | ||
Last updated | 2016-05-13 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Reviews | |||
Stream | WG state | Submitted to IESG for Publication | |
Document shepherd | Dirk Kutscher | ||
Shepherd write-up | Show (last changed 2015-05-08) | ||
IESG | IESG state | RFC 7837 (Experimental) | |
Action Holders |
(None)
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||
Consensus Boilerplate | Yes | ||
Telechat date | |||
Responsible AD | Martin Stiemerling | ||
Send notices to | (None) | ||
IANA | IANA review state | Version Changed - Review Needed | |
IANA action state | No IANA Actions |
Internet Engineering Task Force (IETF) S. Krishnan Request for Comments: 7837 Ericsson Category: Experimental M. Kuehlewind ISSN: 2070-1721 ETH Zurich B. Briscoe Simula Research Laboratory C. Ralli Telefonica May 2016 IPv6 Destination Option for Congestion Exposure (ConEx) Abstract Congestion Exposure (ConEx) is a mechanism by which senders inform the network about the congestion encountered by packets earlier in the same flow. This document specifies an IPv6 destination option that is capable of carrying ConEx markings in IPv6 datagrams. Status of This Memo This document is not an Internet Standards Track specification; it is published for examination, experimental implementation, and evaluation. This document defines an Experimental Protocol for the Internet community. 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). Not all documents approved by the IESG are a candidate for any level of Internet Standard; see 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/rfc7837. Krishnan, et al. Experimental [Page 1] RFC 7837 ConEx Destination Option May 2016 Copyright Notice Copyright (c) 2016 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. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Conventions Used in This Document . . . . . . . . . . . . . . 3 3. Requirements for the Coding of ConEx in IPv6 . . . . . . . . 4 4. ConEx Destination Option (CDO) . . . . . . . . . . . . . . . 5 5. Implementation in the Fast Path of ConEx-Aware Routers . . . 8 6. Tunnel Processing . . . . . . . . . . . . . . . . . . . . . . 8 7. Compatibility with Use of IPsec . . . . . . . . . . . . . . . 9 8. Mitigating Flooding Attacks by Using Preferential Drop . . . 9 9. Security Considerations . . . . . . . . . . . . . . . . . . . 11 10. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11 11. References . . . . . . . . . . . . . . . . . . . . . . . . . 11 11.1. Normative References . . . . . . . . . . . . . . . . . . 11 11.2. Informative References . . . . . . . . . . . . . . . . . 12 Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 13 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 13 Krishnan, et al. Experimental [Page 2] RFC 7837 ConEx Destination Option May 2016 1. Introduction Congestion Exposure (ConEx) [RFC7713] is a mechanism by which senders inform the network about the congestion encountered by packets earlier in the same flow. This document specifies an IPv6 destination option [RFC2460] that can be used for performing ConEx markings in IPv6 datagrams. This document specifies the ConEx wire protocol in IPv6. The ConEx information can be used by any network element on the path to, for example, do traffic management or egress policing. Additionally, this information will potentially be used by an audit function that checks the integrity of the sender's signaling. Further, each transport protocol that supports ConEx signaling will need to precisely specify when the transport sets ConEx markings (e.g., the behavior for TCP is specified in [RFC7786]). This document specifies ConEx for IPv6 only. Due to space limitations in the IPv4 header and the risk of options that might be stripped by a middlebox in IPv4, the primary goal of the workingShow full document text