Packet Network Slicing using Segment Routing
draft-peng-teas-network-slicing-03
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TEAS Shaofu. Peng
Internet-Draft Ran. Chen
Intended status: Standards Track Gregory. Mirsky
Expires: August 19, 2020 ZTE Corporation
Fengwei. Qin
China Mobile
February 16, 2020
Packet Network Slicing using Segment Routing
draft-peng-teas-network-slicing-03
Abstract
This document presents a mechanism aimed at providing a solution for
network slicing in the transport network for 5G services. The
proposed mechanism uses a unified administrative instance identifier
to distinguish different virtual network resources for both intra-
domain and inter-domain network slicing scenarios. Combined with the
segment routing technology, the mechanism could be used for both
best-effort and traffic engineered services for tenants.
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
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This Internet-Draft will expire on August 19, 2020.
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
Peng, et al. Expires August 19, 2020 [Page 1]
Internet-Draft Packet Network Slicing using SR February 2020
carefully, as they describe your rights and restrictions with respect
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Architecture of TN Slicing . . . . . . . . . . . . . . . . . 3
2.1. Key Technologies of Transport slice . . . . . . . . . . . 5
3. Slicing Requirements . . . . . . . . . . . . . . . . . . . . 6
3.1. Dedicated Virtual Networks . . . . . . . . . . . . . . . 6
3.2. End-to-End Slicing . . . . . . . . . . . . . . . . . . . 6
3.3. Unified NSI . . . . . . . . . . . . . . . . . . . . . . . 6
3.4. Traffic Engineering . . . . . . . . . . . . . . . . . . . 7
3.5. Summarized Requirements . . . . . . . . . . . . . . . . . 7
4. Conventions Used in This Document . . . . . . . . . . . . . . 8
5. Overview of Existing Identifiers . . . . . . . . . . . . . . 8
5.1. AG and EAG Bit . . . . . . . . . . . . . . . . . . . . . 8
5.2. Multi-Topology Identifier . . . . . . . . . . . . . . . . 9
5.3. SR Policy Color . . . . . . . . . . . . . . . . . . . . . 9
5.4. Flex-algorithm Identifier . . . . . . . . . . . . . . . . 9
5.5. New Slice-based Identifier Introduced . . . . . . . . . . 10
6. Overview of AII-based Mechanism . . . . . . . . . . . . . . . 10
6.1. Physical Network Partition by AII . . . . . . . . . . . . 11
6.2. Path within AII specific Slice . . . . . . . . . . . . . 11
6.2.1. SR-BE Path within AII specific Slice . . . . . . . . 11
6.2.2. SR-TE Path within AII specific Slice . . . . . . . . 12
6.3. Traffic Steering to SR policy within Slice . . . . . . . 12
6.4. Simple Variant of AII-based Slicing Scheme . . . . . . . 13
7. Resource Allocation per AII . . . . . . . . . . . . . . . . . 13
7.1. L3 Link Resource AII Configuration . . . . . . . . . . . 13
7.2. L2 Link Resource AII Configuration . . . . . . . . . . . 14
7.3. Node Resource AII Configuration . . . . . . . . . . . . . 14
7.4. Service Function Resource AII Configuration . . . . . . . 15
8. E2E Slicing with Centralized Mode . . . . . . . . . . . . . . 15
9. E2E Slicing with Distributed Mode . . . . . . . . . . . . . . 16
10. Combined with SR Flex-algorithm for Stack Depth Optimization 16
10.1. Flex-algo Using AII Criteria . . . . . . . . . . . . . . 17
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