Building blocks for Slicing in Segment Routing Network
draft-ali-spring-network-slicing-building-blocks-02
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SPRING Working Group Z. Ali
Internet-Draft C. Filsfils
Intended status: Standards Track P. Camarillo
Expires: May 6, 2020 Cisco Systems
D. Voyer
Bell Canada
November 3, 2019
Building blocks for Slicing in Segment Routing Network
draft-ali-spring-network-slicing-building-blocks-02.txt
Abstract
This document describes how to build network slice using the
Segment Routing based technology. It explains how the existing
building blocks specified for the Segment Routing can be used for
this purpose.
Status of This Memo
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[Page 1]
Internet-Draft Network Slicing Using SR
Table of Contents
1 Introduction...................................................2
2 Segment Routing Policy.........................................3
2.1 Flex-Algorithm Based SR Policies .........................4
2.2 On-demand SR policy ......................................5
2.3 Automatic Steering .......................................6
2.4 Inter-domain Considerations ..............................6
3 TI-LFA and Microloop Avoidance.................................7
4 SR VPN.........................................................7
5 Stateless Service Programming..................................7
6 Operations, Administration, and Maintenance (OAM)..............8
7 QoS............................................................8
8 Orchestration at the Controller................................9
9 Illustration...................................................9
10 Security Considerations .....................................9
11 IANA Considerations ........................................10
12 References .................................................10
12.1 Normative References ..................................10
7.2...........................................................10
13 Acknowledgments ............................................10
14 Contributors ...............................................10
1 Introduction
As more and more Service Providers and Enterprises operate a
single network infrastructure to support an ever-increasing
number of services, the ability to custom fit transport to
application needs is critically important. This includes
creating network slices with different characteristics can
coexist on top of the shared network infrastructure.
Network Slicing is meant to create (end-to-end) partitioned
network infrastructure that can be used to provide
differentiated connectivity behaviors to fulfill the
requirements of a diverse set of services. Services belonging to
different Network slices can be wholly disjoint or can share
different parts of the network infrastructure. Network Slicing
is one of the requirements in 5G [3GPP 23501].
Segment Routing enables Service Providers to support Network
Slicing without any additional protocol, other than the SR IGP
extensions. The network as a whole, in a distributed and
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