RTGWG S. Ning
Internet-Draft Tata Communications
Intended status: Informational A. Malis
Expires: May 17, 2014 Consultant
D. McDysan
Verizon
L. Yong
Huawei USA
C. Villamizar
Outer Cape Cod Network Consulting
November 13, 2013
Advanced Multipath Use Cases and Design Considerations
draft-ietf-rtgwg-cl-use-cases-05
Abstract
Advanced Multipath is a formalization of multipath techniques
currently in use in IP and MPLS networks and a set of extensions to
existing multipath techniques.
This document provides a set of use cases and design considerations
for Advanced Multipath. Existing practices are described. Use cases
made possible through Advanced Multipath extensions are described.
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This Internet-Draft will expire on May 17, 2014.
Ning, et al. Expires May 17, 2014 [Page 1]Internet-Draft Advanced Multipath Use Cases November 2013Copyright Notice
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Assumptions . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
4. Multipath Foundation Use Cases . . . . . . . . . . . . . . . 5
5. Advanced Multipath Use Cases . . . . . . . . . . . . . . . . 7
5.1. Delay Sensitive Applications . . . . . . . . . . . . . . 7
5.2. Large Volume of IP and LDP Traffic . . . . . . . . . . . 8
5.3. Multipath and Packet Ordering . . . . . . . . . . . . . . 9
5.3.1. MPLS-TP in network edges only . . . . . . . . . . . . 10
5.3.2. Multipath at core LSP ingress/egress . . . . . . . . 11
5.3.3. MPLS-TP as a MPLS client . . . . . . . . . . . . . . 12
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 13
7. Security Considerations . . . . . . . . . . . . . . . . . . . 13
8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 13
9. Informative References . . . . . . . . . . . . . . . . . . . 13
Appendix A. Network Operator Practices and Protocol Usage . . . 16
Appendix B. Existing Multipath Standards and Techniques . . . . 18
B.1. Common Multpath Load Spliting Techniques . . . . . . . . 19
B.2. Static and Dynamic Load Balancing Multipath . . . . . . . 20
B.3. Traffic Split over Parallel Links . . . . . . . . . . . . 20
B.4. Traffic Split over Multiple Paths . . . . . . . . . . . . 21
Appendix C. Characteristics of Transport in Core Networks . . . 21
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 23
1. Introduction
Advanced Multipath requirements are specified in
[I-D.ietf-rtgwg-cl-requirement]. An Advanced Multipath framework is
defined in [I-D.ietf-rtgwg-cl-framework].
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