Tunnel Congestion Feedback
draft-ietf-tsvwg-tunnel-congestion-feedback-00

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Last updated 2015-09-16
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Internet Engineering Task Force                                   X. Wei
INTERNET-DRAFT                                       Huawei Technologies
Intended Status: Informational                                     L.Zhu
Expires: March 19, 2016                              Huawei Technologies
                                                                  L.Deng
                                                            China Mobile
                                                      September 16, 2015

                       Tunnel Congestion Feedback
             draft-ietf-tsvwg-tunnel-congestion-feedback-00

Abstract

   This document describes a mechanism to calculate congestion of a
   tunnel segment based on RFC 6040 recommendations, and a feedback
   protocol by which to send the measured congestion of the tunnel from
   egress to ingress . A basic  model for measuring tunnel congestion
   and feedback is described, and a protocol for carrying the feedback
   data is outlined.

Status of this Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that
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   Internet-Drafts.

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Copyright and License Notice

   Copyright (c) 2015 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 . . . . . . . . . . . . . . . . . . . . . . . . . .  3
   3. Congestion Information Feedback Models  . . . . . . . . . . . .  4
     3.1 Direct Model . . . . . . . . . . . . . . . . . . . . . . . .  4
     3.2 Centralized Model  . . . . . . . . . . . . . . . . . . . . .  4
   4. Congestion Level Measurement  . . . . . . . . . . . . . . . . .  5
   5. Congestion Information Delivery . . . . . . . . . . . . . . . .  7
     5.1 IPFIX Extentions . . . . . . . . . . . . . . . . . . . . . .  7
       5.1.1 ce-cePacketTotalCount  . . . . . . . . . . . . . . . . .  7
       5.1.2 ect0-nectPacketTotalCount  . . . . . . . . . . . . . . .  8
       5.1.3 ect1-nectPacketTotalCount  . . . . . . . . . . . . . . .  8
       5.1.4 ce-nectPacketTotalCount  . . . . . . . . . . . . . . . .  8
       5.1.5 ce-ect0PacketTotalCount  . . . . . . . . . . . . . . . .  9
       5.1.6 ce-ect1PacketTotalCount  . . . . . . . . . . . . . . . .  9
       5.1.7 ect0-ect0PacketTotalCount  . . . . . . . . . . . . . . .  9
       5.1.8 ect1-ect1PacketTotalCount  . . . . . . . . . . . . . . . 10
   6. Congestion Management . . . . . . . . . . . . . . . . . . . . . 10
   7. Security  . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
   8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 11
   9. References  . . . . . . . . . . . . . . . . . . . . . . . . . . 11
     9.1  Normative References  . . . . . . . . . . . . . . . . . . . 11
     9.2  Informative References  . . . . . . . . . . . . . . . . . . 12
   10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 12
   Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 12

 

Wei                      Expires March 19, 2016                 [Page 2]
INTERNET DRAFT         Tunnel Congestion Feedback     September 16, 2015

1. Introduction

   In IP network, persistent congestion (or named congestion collapse)
   lowers transport throughput, leading to waste of network resource.
   Appropriate congestion control mechanisms are therefore critical to
   prevent the network from falling into the persistent congestion
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