DLEP Credit-Based Flow Control Messages and Data Items
draft-ietf-manet-dlep-credit-flow-control-06
Network Working Group B. Cheng
Internet-Draft D. Wiggins
Intended status: Standards Track MIT Lincoln Laboratory
Expires: December 5, 2020 L. Berger
LabN Consulting, L.L.C.
S. Ratliff
June 3, 2020
DLEP Credit-Based Flow Control Messages and Data Items
draft-ietf-manet-dlep-credit-flow-control-06
Abstract
This document defines new Dynamic Link Exchange Protocol (DLEP) Data
Items that are used to support credit-based flow control. Credit
window control is used to regulate when data may be sent to an
associated virtual or physical queue. The Data Items are defined in
an extensible and reusable fashion. Their use will be mandated in
other documents defining specific DLEP extensions.
Status of This Memo
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This Internet-Draft will expire on December 5, 2020.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
1.1. Key Words . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Credit Window Control . . . . . . . . . . . . . . . . . . . . 3
2.1. Data Plane Considerations . . . . . . . . . . . . . . . . 5
2.2. Credit Window Messages . . . . . . . . . . . . . . . . . 5
2.2.1. Credit Control Message . . . . . . . . . . . . . . . 5
2.2.2. Credit Control Response Message . . . . . . . . . . . 6
2.3. Credit Window Control Data Items . . . . . . . . . . . . 7
2.3.1. Credit Window Initialization . . . . . . . . . . . . 7
2.3.2. Credit Window Associate . . . . . . . . . . . . . . . 9
2.3.3. Credit Window Grant . . . . . . . . . . . . . . . . . 10
2.3.4. Credit Window Status . . . . . . . . . . . . . . . . 12
2.3.5. Credit Window Request . . . . . . . . . . . . . . . . 13
2.4. Management Considerations . . . . . . . . . . . . . . . . 14
3. Compatibility . . . . . . . . . . . . . . . . . . . . . . . . 14
4. Security Considerations . . . . . . . . . . . . . . . . . . . 15
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 15
5.1. Message Values . . . . . . . . . . . . . . . . . . . . . 15
5.2. Data Item Values . . . . . . . . . . . . . . . . . . . . 15
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1. Normative References . . . . . . . . . . . . . . . . . . 16
6.2. Informative References . . . . . . . . . . . . . . . . . 16
Appendix A. Acknowledgments . . . . . . . . . . . . . . . . . . 17
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 17
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. DLEP defines Data Items which are sets of information
that can be reused in DLEP messaging. The base DLEP specification
does not include any flow identification beyond DLEP endpoints or
flow control capability. There are various flow control techniques
theoretically possible with DLEP. For example, a credit-window
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