SRH Extension for Redundancy Protection
draft-geng-6man-redundancy-protection-srh-00
IPv6 Maintenance Working Group X. Geng
Internet-Draft M. Chen
Intended status: Standards Track F. Yang
Expires: August 24, 2021 Huawei Technologies
February 20, 2021
SRH Extension for Redundancy Protection
draft-geng-6man-redundancy-protection-srh-00
Abstract
Redundancy protection is a method of service protection by sending
copies of the same packets of one flow over multiple paths, which
includes packet replication, elimination and ordering. This document
defines SRv6 header (SRH) extensions to support redundancy
protection.
Requirements Language
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in .
Status of This Memo
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This Internet-Draft will expire on August 24, 2021.
Copyright Notice
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document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology and Conventions . . . . . . . . . . . . . . . . . 2
3. Redundancy Protection over SRv6 Scenario . . . . . . . . . . 3
4. SRH Extension for Redundancy Protection . . . . . . . . . . . 3
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
6. Security Considerations . . . . . . . . . . . . . . . . . . . 4
7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 4
8. Normative References . . . . . . . . . . . . . . . . . . . . 4
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
Redundancy protection is a method of providing 1+1 protection by
sending copies of the same packets of one flow over multiple paths,
which includes packet replication, elimination and ordering. This
document defines SRv6 header (SRH) extensions to support redundancy
protection.
2. Terminology and Conventions
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
Redundancy Node: the start point of redundancy protection, which is a
network device that could implement packet replication.
Merging Node: the end point of redundancy protection, which is a
network node that could implement packet elimination and ordering
(optionally).
Flow Identification: information in SR data service to indicate one
flow.
Sequence Number: information in SR data service to indicate the
packet sequence of one flow.
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Editor's Note: Similar mechanism is defined as "Service Protection"
in the [RFC8655]. In this document, we define a new term "Redundancy
Protection" to distinguish with other service protection method.
Some of the terms are the similar as [RFC8655].
3. Redundancy Protection over SRv6 Scenario
The figure shows how to provide redundancy protection over SRv6.
| |
----IPv6--->|<---------------SRv6 Domain------------>|<----IPv6---
| |
| +------+R1+----+ |
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