Segment Routing based Virtual Transport Network for Enhanced VPN
draft-dong-spring-sr-for-enhanced-vpn-10
SPRING Working Group J. Dong
Internet-Draft Huawei Technologies
Intended status: Informational S. Bryant
Expires: March 4, 2021 Futurewei Technologies
T. Miyasaka
KDDI Corporation
Y. Zhu
China Telecom
F. Qin
Z. Li
China Mobile
F. Clad
Cisco Systems
August 31, 2020
Segment Routing based Virtual Transport Network for Enhanced VPN
draft-dong-spring-sr-for-enhanced-vpn-10
Abstract
I-D.ietf-spring-resource-aware-segments describes the mechanism to
associate network resource attributes to Segment Routing Identifiers
(SIDs). The resource-aware SIDs can be used to build SR paths with a
set of reserved network resources. In addition, the resource-aware
SIDs can be used to build SR based virtual networks, which can be
used as virtual underlay networks with the network topology and
resource attributes required by different customers or services.
Such virtual networks are called virtual transport networks (VTNs).
This document describes the mechanism of using resource-aware SIDs to
build SR based VTNs.
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This Internet-Draft will expire on March 4, 2021.
Dong, et al. Expires March 4, 2021 [Page 1]
Internet-Draft SR for VPN+ August 2020
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Resource-Aware SIDs for VTN . . . . . . . . . . . . . . . . . 3
2.1. SR-MPLS . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2. SRv6 . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. Procedures . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1. VTN Topology and Resource Computation . . . . . . . . . . 5
3.2. VTN Network Resource and SID Allocation . . . . . . . . . 6
3.3. Construction of SR based VTNs . . . . . . . . . . . . . . 8
3.4. Mapping Service to SR based VTN . . . . . . . . . . . . . 9
3.5. VTN Visibility to Customer . . . . . . . . . . . . . . . 9
4. Benefits of the Proposed Mechanism . . . . . . . . . . . . . 10
5. Service Assurance . . . . . . . . . . . . . . . . . . . . . . 11
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 11
7. Security Considerations . . . . . . . . . . . . . . . . . . . 11
8. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 12
9. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 12
10. References . . . . . . . . . . . . . . . . . . . . . . . . . 12
10.1. Normative References . . . . . . . . . . . . . . . . . . 12
10.2. Informative References . . . . . . . . . . . . . . . . . 12
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15
1. Introduction
Segment Routing (SR) [RFC8402] specifies a mechanism to steer packets
through an ordered list of segments. A segment is referred to by its
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