Dynamic Link Exchange Protocol (DLEP)
draft-ietf-manet-dlep-29

Document Type Active Internet-Draft (manet WG)
Last updated 2017-04-05 (latest revision 2017-03-28)
Replaces draft-sratliff-manet-dlep
Stream IETF
Intended RFC status Proposed Standard
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Document shepherd Justin Dean
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IESG IESG state RFC Ed Queue
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Responsible AD Alvaro Retana
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IANA IANA review state Version Changed - Review Needed
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Mobile Ad hoc Networks Working Group                          S. Ratliff
Internet-Draft                                                VT iDirect
Intended status: Standards Track                                 S. Jury
Expires: September 29, 2017                                Cisco Systems
                                                          D. Satterwhite
                                                                Broadcom
                                                               R. Taylor
                                                  Airbus Defence & Space
                                                                B. Berry
                                                          March 28, 2017

                 Dynamic Link Exchange Protocol (DLEP)
                        draft-ietf-manet-dlep-29

Abstract

   When routing devices rely on modems to effect communications over
   wireless links, they need timely and accurate knowledge of the
   characteristics of the link (speed, state, etc.) in order to make
   routing decisions.  In mobile or other environments where these
   characteristics change frequently, manual configurations or the
   inference of state through routing or transport protocols does not
   allow the router to make the best decisions.  DLEP describes a new
   protocol for a bidirectional, event-driven communication channel
   between the router and the modem to facilitate communication of
   changing link characteristics.

Status of This Memo

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

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on September 29, 2017.

Ratliff, et al.        Expires September 29, 2017               [Page 1]
Internet-Draft    Dynamic Link Exchange Protocol (DLEP)       March 2017

Copyright Notice

   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
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
   2.  Protocol Overview . . . . . . . . . . . . . . . . . . . . . .   7
     2.1.  Destinations  . . . . . . . . . . . . . . . . . . . . . .   8
     2.2.  Conventions and Terminology . . . . . . . . . . . . . . .   9
   3.  Requirements  . . . . . . . . . . . . . . . . . . . . . . . .   9
   4.  Implementation Scenarios  . . . . . . . . . . . . . . . . . .   9
   5.  Assumptions . . . . . . . . . . . . . . . . . . . . . . . . .  10
   6.  Metrics . . . . . . . . . . . . . . . . . . . . . . . . . . .  11
   7.  DLEP Session Flow . . . . . . . . . . . . . . . . . . . . . .  12
     7.1.  Peer Discovery State  . . . . . . . . . . . . . . . . . .  12
     7.2.  Session Initialization State  . . . . . . . . . . . . . .  13
     7.3.  In-Session State  . . . . . . . . . . . . . . . . . . . .  14
       7.3.1.  Heartbeats  . . . . . . . . . . . . . . . . . . . . .  14
     7.4.  Session Termination State . . . . . . . . . . . . . . . .  15
     7.5.  Session Reset state . . . . . . . . . . . . . . . . . . .  15
       7.5.1.  Unexpected TCP connection termination . . . . . . . .  16
   8.  Transaction Model . . . . . . . . . . . . . . . . . . . . . .  16
   9.  Extensions  . . . . . . . . . . . . . . . . . . . . . . . . .  17
     9.1.  Experiments . . . . . . . . . . . . . . . . . . . . . . .  17
   10. Scalability . . . . . . . . . . . . . . . . . . . . . . . . .  18
   11. DLEP Signal and Message Structure . . . . . . . . . . . . . .  18
     11.1.  DLEP Signal Header . . . . . . . . . . . . . . . . . . .  18
     11.2.  DLEP Message Header  . . . . . . . . . . . . . . . . . .  19
     11.3.  DLEP Generic Data Item . . . . . . . . . . . . . . . . .  20
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