IGP Extensions for Segment Routing based Enhanced VPN
draft-dong-lsr-sr-enhanced-vpn-04
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2020-06-23
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LSR Working Group J. Dong
Internet-Draft Z. Hu
Intended status: Standards Track Z. Li
Expires: December 25, 2020 Huawei Technologies
X. Tang
R. Pang
China Unicom
L. JooHeon
LG U+
S. Bryant
Futurewei Technologies
June 23, 2020
IGP Extensions for Segment Routing based Enhanced VPN
draft-dong-lsr-sr-enhanced-vpn-04
Abstract
Enhanced VPN (VPN+) is an enhancement to VPN services to support the
needs of new applications, particularly including the applications
that are associated with 5G services. These applications require
enhanced isolation and have more stringent performance requirements
than that can be provided with traditional overlay VPNs. An enhanced
VPN may be used for 5G transport network slicing, and will also be of
use in more generic scenarios. To meet the requirement of enhanced
VPN services, a number of Virtual Transport Networks (VTN) need to be
created, each with a subset of the underlay network topology and a
set of network resources allocated to meet the requirement of a
specific VPN+ service, or a group of VPN+ services.
This document specifies the IGP mechanisms with necessary extensions
to build a set of Segment Routing (SR) based VTNs. The VTNs could be
used as the underlay of enhanced VPN service. The proposed mechanism
is applicable to both Segment Routing with MPLS data plane (SR-MPLS)
and segment routing with IPv6 data plane (SRv6).
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.
Dong, et al. Expires December 25, 2020 [Page 1]
Internet-Draft IGP Extensions for SR VPN+ June 2020
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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
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. VTN Definition Advertisement . . . . . . . . . . . . . . . . 4
3. Advertisement of VTN Topology Attribute . . . . . . . . . . . 5
3.1. MTR based Topology Advertisement . . . . . . . . . . . . 5
3.2. Flex-Algo based Topology Advertisement . . . . . . . . . 6
4. Advertisement of VTN Resource Attribute . . . . . . . . . . . 7
5. Advertisement of VTN specific Data Plane Identifiers . . . . 8
5.1. Advertisement of VTN-specific MPLS SIDs . . . . . . . . . 9
5.2. Advertisement of VTN-specific SRv6 Locators . . . . . . . 11
5.3. Advertisement of Dedicated Data Plane VTN IDs . . . . . . 11
6. Security Considerations . . . . . . . . . . . . . . . . . . . 12
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12
8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 12
9. References . . . . . . . . . . . . . . . . . . . . . . . . . 12
9.1. Normative References . . . . . . . . . . . . . . . . . . 12
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