Load Sharing for the Stream Control Transmission Protocol (SCTP)
draft-tuexen-tsvwg-sctp-multipath-20
Network Working Group P. Amer
Internet-Draft University of Delaware
Intended status: Experimental M. Becke
Expires: January 29, 2021 HAW Hamburg
T. Dreibholz
SimulaMet
N. Ekiz
University of Delaware
J. Iyengar
Franklin and Marshall College
P. Natarajan
Cisco Systems
R. Stewart
Netflix
M. Tuexen
Muenster Univ. of Appl. Sciences
July 28, 2020
Load Sharing for the Stream Control Transmission Protocol (SCTP)
draft-tuexen-tsvwg-sctp-multipath-20
Abstract
The Stream Control Transmission Protocol (SCTP) supports multi-homing
for providing network fault tolerance. However, mainly one path is
used for data transmission. Only timer-based retransmissions are
carried over other paths as well.
This document describes how multiple paths can be used simultaneously
for transmitting user messages.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on January 29, 2021.
Amer, et al. Expires January 29, 2021 [Page 1]
Internet-Draft Load Sharing for SCTP July 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Conventions . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Load Sharing . . . . . . . . . . . . . . . . . . . . . . . . 3
3.1. Split Fast Retransmissions . . . . . . . . . . . . . . . 4
3.2. Appropriate Congestion Window Growth . . . . . . . . . . 4
3.3. Appropriate Delayed Acknowledgements . . . . . . . . . . 5
4. Non-Renegable SACK . . . . . . . . . . . . . . . . . . . . . 6
4.1. Negotiation . . . . . . . . . . . . . . . . . . . . . . . 6
4.2. The New Chunk Type: Non-Renegable SACK (NR-SACK) . . . . 6
4.3. An Illustrative Example . . . . . . . . . . . . . . . . . 11
4.4. Procedures . . . . . . . . . . . . . . . . . . . . . . . 15
4.4.1. Sending an NR-SACK chunk . . . . . . . . . . . . . . 15
4.4.2. Receiving an NR-SACK Chunk . . . . . . . . . . . . . 17
5. Buffer Blocking Mitigation . . . . . . . . . . . . . . . . . 18
5.1. Sender Buffer Splitting . . . . . . . . . . . . . . . . . 18
5.2. Receiver Buffer Splitting . . . . . . . . . . . . . . . . 18
5.3. Chunk Rescheduling . . . . . . . . . . . . . . . . . . . 18
5.4. Problems during Path Failure . . . . . . . . . . . . . . 19
5.4.1. Problem Description . . . . . . . . . . . . . . . . . 19
5.4.2. Solution: Potentially-failed Destination State . . . 19
5.5. Non-Renegable SACK . . . . . . . . . . . . . . . . . . . 20
5.5.1. Problem Description . . . . . . . . . . . . . . . . . 20
5.5.2. Solution: Non-Renegable SACKs . . . . . . . . . . . . 20
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