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Dynamic Link Exchange Protocol (DLEP) (RFC8175) Disclosure Number: IPCOM000250272D
Original Publication Date: 2017-Jun-01
Included in the Prior Art Database: 2017-Jun-21

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

S. Ratliff: AUTHOR [+5]


There exist today a collection of modem devices that control links of variable data rate and quality. Examples of these types of links include line-of-sight (LOS) terrestrial radios, satellite terminals, and broadband modems. Fluctuations in speed and quality of these links can occur due to configuration, or on a moment-to-moment basis, due to physical phenomena like multipath interference, obstructions, rain fade, etc. It is also quite possible that link quality and data rate vary with respect to individual destinations on a link and with the type of traffic being sent. As an example, consider the case of an IEEE 802.11 access point serving two associated laptop computers. In this environment, the answer to the question "What is the data rate on the 802.11 link?" is "It depends on which associated laptop we're talking about and on what kind of traffic is being sent." While the first laptop, being physically close to the access

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Internet Engineering Task Force (IETF)                        S. Ratliff Request for Comments: 8175                                    VT iDirect Category: Standards Track                                        S. Jury ISSN: 2070-1721                                            Cisco Systems                                                           D. Satterwhite                                                                 Broadcom                                                                R. Taylor                                                   Airbus Defence & Space                                                                 B. Berry                                                                June 2017

                  Dynamic Link Exchange Protocol (DLEP)


   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.  This document    introduces a new protocol called the Dynamic Link Exchange Protocol    (DLEP), which provides a bidirectional, event-driven communication    channel between the router and the modem to facilitate communication    of changing link characteristics.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

 Ratliff, et al.              Standards Track                    [Page 1]
 RFC 8175          Dynamic Link Exchange Protocol (DLEP)        June 2017

 Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the    document authors.  All rig...