DLEP DiffServ Aware Credit Window Extension
draft-ietf-manet-dlep-da-credit-extension-05

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Last updated 2018-05-01
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Network Working Group                                           B. Cheng
Internet-Draft                                                D. Wiggins
Intended status: Standards Track                      Lincoln Laboratory
Expires: November 2, 2018                                      L. Berger
                                                 LabN Consulting, L.L.C.
                                                             May 1, 2018

              DLEP DiffServ Aware Credit Window Extension
              draft-ietf-manet-dlep-da-credit-extension-05

Abstract

   This document defines an extension to the DLEP protocol that enables
   a DiffServ aware credit-window scheme for destination-specific and
   shared flow control.

Status of This Memo

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   This Internet-Draft will expire on November 2, 2018.

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   Copyright (c) 2018 IETF Trust and the persons identified as the
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Cheng, et al.           Expires November 2, 2018                [Page 1]
Internet-Draft          DLEP DA Credit Extension                May 2018

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Key Words . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Extension Usage and Identification  . . . . . . . . . . . . .   3
   3.  Management Considerations . . . . . . . . . . . . . . . . . .   3
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
     5.1.  Extension Type Value  . . . . . . . . . . . . . . . . . .   4
   6.  References  . . . . . . . . . . . . . . . . . . . . . . . . .   4
     6.1.  Normative References  . . . . . . . . . . . . . . . . . .   5
     6.2.  Informative References  . . . . . . . . . . . . . . . . .   5
   Appendix A.  Acknowledgments  . . . . . . . . . . . . . . . . . .   5
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   5

1.  Introduction

   The Dynamic Link Exchange Protocol (DLEP) is defined in [RFC8175].
   It provides the exchange of link related control information between
   DLEP peers.  DLEP peers are comprised of a modem and a router.  DLEP
   defines a base set of mechanisms as well as support for possible
   extensions.  This document defines one such extension.

   The base DLEP specification does not include any flow control
   capability.  There are various flow control techniques theoretically
   possible with DLEP.  For example, a credit-window scheme for
   destination-specific flow control which provides aggregate flow
   control for both modem and routers has been proposed in
   [I-D.ietf-manet-credit-window].

   This document defines a DLEP extension which provides a flow control
   mechanism for traffic sent from a router to a modem.  Flow control is
   provided using one or more logical "Credit Windows", each of which
   will typically be supported by an associated virtual or physical
   queue.  Traffic sent by a router will use traffic flow classification
   information provided by the modem to identify which traffic is
   associated with each credit window.  (For general background on
   traffic classification see [RFC2475] Section 2.3.)  Credit windows
   may be shared or dedicated on a per flow basis.  The extension is
   structured to allow for reuse of the defined credit window based flow
   control with different traffic classification techniques.

   This document uses the traffic classification and credit window
   control mechanisms defined in [I-D.ietf-manet-credit-flow-control] to
   provided credit window based flow control based on on DLEP
   destination and DiffServ [RFC2475] DSCPs (differentiated services
   codepoints).  The defined mechanism allows for credit windows to be
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