Dynamic Link Exchange Protocol (DLEP) Multi-Hop Forwarding Extension
RFC 8629
| Document | Type | RFC - Proposed Standard (July 2019; No errata) | |
|---|---|---|---|
| Authors | Bow-Nan Cheng , Lou Berger | ||
| Last updated | 2019-07-23 | ||
| Replaces | draft-cheng-manet-dlep-multi-hop-extension | ||
| Stream | Internent Engineering Task Force (IETF) | ||
| Formats | plain text html pdf htmlized (tools) htmlized bibtex | ||
| Reviews | |||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Stan Ratliff | ||
| Shepherd write-up | Show (last changed 2018-08-13) | ||
| IESG | IESG state | RFC 8629 (Proposed Standard) | |
| Action Holders |
(None)
|
||
| Consensus Boilerplate | Yes | ||
| Telechat date | |||
| Responsible AD | Alvaro Retana | ||
| Send notices to | Stan Ratliff <sratliff@idirect.net>, aretana.ietf@gmail.com | ||
| IANA | IANA review state | Version Changed - Review Needed | |
| IANA action state | RFC-Ed-Ack | ||
Internet Engineering Task Force (IETF) B. Cheng
Request for Comments: 8629 MIT Lincoln Laboratory
Category: Standards Track L. Berger, Ed.
ISSN: 2070-1721 LabN Consulting, L.L.C.
July 2019
Dynamic Link Exchange Protocol (DLEP) Multi-Hop Forwarding Extension
Abstract
This document defines an extension to the Dynamic Link Exchange
Protocol (DLEP) that enables the reporting and control of multi-hop
forwarding by DLEP-capable modems.
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
https://www.rfc-editor.org/info/rfc8629.
Copyright Notice
Copyright (c) 2019 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
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Cheng & Berger Standards Track [Page 1]
RFC 8629 DLEP Multi-Hop Extension July 2019
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Key Words . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Extension Usage and Identification . . . . . . . . . . . . . 3
3. Extension Data Items . . . . . . . . . . . . . . . . . . . . 3
3.1. Hop Count . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2. Hop Control . . . . . . . . . . . . . . . . . . . . . . . 5
3.2.1. Reset . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2.2. Terminate . . . . . . . . . . . . . . . . . . . . . . 7
3.2.3. Direct Connection . . . . . . . . . . . . . . . . . . 7
3.2.4. Suppress Forwarding . . . . . . . . . . . . . . . . . 7
4. Security Considerations . . . . . . . . . . . . . . . . . . . 8
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 8
5.1. Extension Type Value . . . . . . . . . . . . . . . . . . 8
5.2. Data Item Values . . . . . . . . . . . . . . . . . . . . 9
5.3. Hop Control Actions Registry . . . . . . . . . . . . . . 9
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.1. Normative References . . . . . . . . . . . . . . . . . . 10
6.2. Informative References . . . . . . . . . . . . . . . . . 10
Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . . 10
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 10
1. Introduction
The Dynamic Link Exchange Protocol (DLEP) is defined in [RFC8175].
It provides the exchange of link-related control information between
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.
Some modem technologies support mobile ad hoc network (MANET)
forwarding where connectivity to destinations is provided via
forwarding in intermediate modems. This document refers to
forwarding by intermediate modems as "multi-hop forwarding". DLEP
Destination Messages can be used to report such reachable
destinations (see [RFC8175]), but do not provide any information
related to the number or capacity of the hops. The extension defined
in this document enables modems to inform routers when multi-hop
forwarding is being used and allows routers to request that modems
change multi-hop forwarding behavior. The extension defined in this
document is referred to as "Multi-Hop Forwarding", where each modem
that transmits/sends data to reach a particular destination is
counted as a hop.
It is important to note that the use of the Hop Control mechanism
defined in this document can result in connectivity changes and even
loss of the ability to reach one or more destinations. The defined
Cheng & Berger Standards Track [Page 2]
RFC 8629 DLEP Multi-Hop Extension July 2019
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