DLEP DiffServ Aware Credit Windowing Extension
draft-cheng-manet-dlep-da-credit-extension-00

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Last updated 2016-10-27
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Network Working Group                                           B. Cheng
Internet-Draft                                                D. Wiggins
Intended status: Standards Track                      Lincoln Laboratory
Expires: April 30, 2017                                        L. Berger
                                                 LabN Consulting, L.L.C.
                                                        October 27, 2016

             DLEP DiffServ Aware Credit Windowing Extension
             draft-cheng-manet-dlep-da-credit-extension-00

Abstract

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

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Cheng, et al.            Expires April 30, 2017                 [Page 1]
Internet-Draft          DLEP DA Credit Extension            October 2016

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Key Words . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Extension Overview  . . . . . . . . . . . . . . . . . . . . .   3
   3.  Extension Usage and Identification  . . . . . . . . . . . . .   4
   4.  Extension Messages  . . . . . . . . . . . . . . . . . . . . .   4
     4.1.  Credit Control Message  . . . . . . . . . . . . . . . . .   4
     4.2.  Credit Control Response Message . . . . . . . . . . . . .   5
   5.  Extension Data Items  . . . . . . . . . . . . . . . . . . . .   5
     5.1.  Queue Parameters  . . . . . . . . . . . . . . . . . . . .   5
     5.2.  DiffServ Aware (DA) Credit Grant  . . . . . . . . . . . .   8
     5.3.  DiffServ Aware (DA) Credit Window Status  . . . . . . . .  10
     5.4.  DiffServ Aware (DA) Credit Request  . . . . . . . . . . .  11
   6.  Compatibility . . . . . . . . . . . . . . . . . . . . . . . .  12
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
     8.1.  Extension Type Value  . . . . . . . . . . . . . . . . . .  13
     8.2.  Message Values  . . . . . . . . . . . . . . . . . . . . .  13
     8.3.  Data Item Values  . . . . . . . . . . . . . . . . . . . .  14
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  14
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  14
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  15

1.  Introduction

   The Dynamic Link Event Protocol (DLEP) is defined in
   [I-D.ietf-manet-dlep].  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 theoretically possible
   with DLEP.  For example, a credit-windowing 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 flow control
   for DiffServ [RFC2475] traffic sent from a router to a modem.  Flow
   control is provided for multiple DSCPs (differentiated services
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