SRv6 Deployment Consideration
draft-tian-spring-srv6-deployment-consideration-03
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2020-07-08
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Network Working Group H. Tian
Internet-Draft F. Zhao
Intended status: Informational CAICT
Expires: January 10, 2021 C. Xie
China Telecom
T. Li
J. Ma
China Unicom
R. Mwehaire
MTN Uganda Ltd.
E. Chingwena
MTN Group Limited
S. Peng, Ed.
Z. Li
Y. Xiao
Huawei Technologies
July 9, 2020
SRv6 Deployment Consideration
draft-tian-spring-srv6-deployment-consideration-03
Abstract
SRv6 has significant advantages over SR-MPLS and has attracted more
and more attention and interest from network operators and verticals.
Smooth network migration towards SRv6 is a key focal point and this
document provides network design and migration guidance and
recommendations on solutions in various scenarios. Deployment cases
with SRv6 are also introduced.
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 RFC 2119 [RFC2119].
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Tian, et al. Expires January 10, 2021 [Page 1]
Internet-Draft SRv6 Deployment Consideration July 2020
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on January 10, 2021.
Copyright Notice
Copyright (c) 2020 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Advantages of SRv6 . . . . . . . . . . . . . . . . . . . . . 4
2.1. IP Route Aggregation . . . . . . . . . . . . . . . . . . 4
2.2. End-to-end Service Auto-start . . . . . . . . . . . . . . 5
2.3. On-Demand Upgrade . . . . . . . . . . . . . . . . . . . . 6
2.4. Simplified Service Deployment . . . . . . . . . . . . . . 7
2.4.1. Carrier's Carrier . . . . . . . . . . . . . . . . . . 7
2.4.2. LDP over TE . . . . . . . . . . . . . . . . . . . . . 8
3. Compatibility Challenges . . . . . . . . . . . . . . . . . . 9
3.1. Fast Reroute (FRR) . . . . . . . . . . . . . . . . . . . 9
3.2. Traffic Engineering (TE) . . . . . . . . . . . . . . . . 10
3.3. Service Function Chaining (SFC) . . . . . . . . . . . . . 10
3.4. IOAM . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4. Solutions for mitigating the compatibility challenges . . . . 11
4.1. Traffic Engineering . . . . . . . . . . . . . . . . . . . 12
4.1.1. Binding SID (BSID) . . . . . . . . . . . . . . . . . 12
4.1.2. PCEP FlowSpec . . . . . . . . . . . . . . . . . . . . 12
4.2. SFC . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2.1. Stateless SFC . . . . . . . . . . . . . . . . . . . . 12
4.2.2. Stateful SFC . . . . . . . . . . . . . . . . . . . . 13
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