Network Working Group P. Amer
Internet-Draft University of Delaware
Intended status: Experimental M. Becke
Expires: September 20, 2014 University of Duisburg-Essen
T. Dreibholz
Simula Research Laboratory
N. Ekiz
University of Delaware
J. Iyengar
Franklin and Marshall College
P. Natarajan
Cisco Systems
R. Stewart
Adara Networks
M. Tuexen
Muenster Univ. of Appl. Sciences
March 19, 2014
Load Sharing for the Stream Control Transmission Protocol (SCTP)
draft-tuexen-tsvwg-sctp-multipath-08.txt
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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This Internet-Draft will expire on September 20, 2014.
Amer, et al. Expires September 20, 2014 [Page 1]Internet-Draft Loadsharing for SCTP March 2014Copyright Notice
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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
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