DLEP DiffServ Aware Credit Window Extension
draft-ietf-manet-dlep-da-credit-extension-06

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Last updated 2018-08-02
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Network Working Group                                           B. Cheng
Internet-Draft                                                D. Wiggins
Intended status: Standards Track                  MIT Lincoln Laboratory
Expires: February 3, 2019                                      L. Berger
                                                 LabN Consulting, L.L.C.
                                                          August 2, 2018

              DLEP DiffServ Aware Credit Window Extension
              draft-ietf-manet-dlep-da-credit-extension-06

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 February 3, 2019.

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   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Cheng, et al.           Expires February 3, 2019                [Page 1]
Internet-Draft          DLEP DA Credit Extension             August 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.  This document defines a DLEP extension which
   provides a DiffServ-based 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.  Credit windows may be shared or dedicated on a per flow
   basis.  See [I-D.berger-manet-dlep-ether-credit-extension] for an
   Ethernet-based version of credit window flow control.

   This document uses the traffic classification and credit window
   control mechanisms defined in
   [I-D.ietf-manet-dlep-traffic-classification] and
   [I-D.ietf-manet-dlep-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 shared across traffic sent
   to multiple DLEP destinations and DSCPs, or used exclusively for
   traffic sent to a particular destination and/or DSCP.  The extension
   also supports the "wildcard" matching of any DSCP.
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