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Internet Engineering Task Force                                   X. Wei
INTERNET-DRAFT                                       Huawei Technologies
Intended Status: Informational                                     L.Zhu
Expires: June 7, 2018                                Huawei Technologies
                                                                  L.Deng
                                                            China Mobile
                                                        December 4, 2017





                       Tunnel Congestion Feedback
             draft-ietf-tsvwg-tunnel-congestion-feedback-07


Abstract

   This document describes a method to measure congestion on a tunnel
   segment based on recommendations from RFC 6040, "Tunneling of
   Explicit Congestion Notification", and to use IPFIX to communicate
   the congestion measurements from the tunnel's egress to a controller
   which can respond by modifying the traffic control policies at the
   tunnel's ingress.

Status of this Memo

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

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Copyright and License Notice



Wei                       Expires June 7, 2018                  [Page 1]
INTERNET DRAFT         Tunnel Congestion Feedback       December 4, 2017


   Copyright (c) 2017 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 And Terminologies . . . . . . . . . . . . . . . . .  3
   3. Congestion Information Feedback Models  . . . . . . . . . . . .  4
   4. Congestion Level Measurement  . . . . . . . . . . . . . . . . .  5
   5. Congestion Information Delivery . . . . . . . . . . . . . . . .  7
     5.1 IPFIX Extensions . . . . . . . . . . . . . . . . . . . . . .  8
       5.1.1 tunnelEcnCeCeByteTotalCount  . . . . . . . . . . . . . .  8
       5.1.2 tunnelEcnEct0NectBytetTotalCount . . . . . . . . . . . .  8
       5.1.3 tunnelEcnEct1NectByteTotalCount  . . . . . . . . . . . .  9
       5.1.4 tunnelEcnCeNectByteTotalCount  . . . . . . . . . . . . .  9
       5.1.5 tunnelEcnCeEct0ByteTotalCount  . . . . . . . . . . . . .  9
       5.1.6 tunnelEcnCeEct1ByteTotalCount  . . . . . . . . . . . . . 10
       5.1.7 tunnelEcnEct0Ect0ByteTotalCount  . . . . . . . . . . . . 10
       5.1.8 tunnelEcnEct1Ect1PacketTotalCount  . . . . . . . . . . . 10
       5.1.9 tunnelEcnCEMarkedRatio . . . . . . . . . . . . . . . . . 11
   6. Congestion Management . . . . . . . . . . . . . . . . . . . . . 11
     6.1 Example  . . . . . . . . . . . . . . . . . . . . . . . . . . 12
   7. Security Considerations . . . . . . . . . . . . . . . . . . . . 15
   8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 16
   9. References  . . . . . . . . . . . . . . . . . . . . . . . . . . 18
     9.1  Normative References  . . . . . . . . . . . . . . . . . . . 18
     9.2  Informative References  . . . . . . . . . . . . . . . . . . 19
   10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 19
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 19










Wei                       Expires June 7, 2018                  [Page 2]