SRv6 and MPLS interworking for VPN service
draft-pzm-bess-spring-interdomain-vpn-00
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SPRING WG Shaofu. Peng
Internet-Draft Zheng. Zhang
Intended status: Standards Track Greg. Mirsky
Expires: April 26, 2020 ZTE Corporation
October 24, 2019
SRv6 and MPLS interworking for VPN service
draft-pzm-bess-spring-interdomain-vpn-00
Abstract
This document describes a method to achieve an inter-domain
connection for a VPN (Virtual Private Network) service.
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/.
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 April 26, 2020.
Copyright Notice
Copyright (c) 2019 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
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the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Peng, et al. Expires April 26, 2020 [Page 1]
Internet-Draft BESS SPRING inter-domain VPN October 2019
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Specification . . . . . . . . . . . . . . . . . . . . . . . . 2
2.1. SRv6 to SR-MPLS domain signaling . . . . . . . . . . . . 2
2.2. SR-MPLS to SRv6 domain signaling . . . . . . . . . . . . 3
3. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4
4. Security Considerations . . . . . . . . . . . . . . . . . . . 4
5. References . . . . . . . . . . . . . . . . . . . . . . . . . 4
5.1. Normative References . . . . . . . . . . . . . . . . . . 4
5.2. Informative References . . . . . . . . . . . . . . . . . 5
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 5
1. Introduction
[I-D.agrawal-spring-srv6-mpls-interworking] describes SRv6 and MPLS/
SR-MPLS interworking and co-existence procedures. The document
leverages the function defined in
[I-D.ietf-spring-srv6-network-programming] to give guidance to the
forwarding in routers.
[RFC4364] describes a method by which a Service Provider may use an
IP backbone to provide IP Virtual Private Networks (VPNs) for its
customers. When SRv6 and SR-MPLS are co-existed in the backbone,
controller or a control plane, for example, using BGP, should be used
to instantiate the VPN service as described in
[I-D.agrawal-spring-srv6-mpls-interworking].
In case of option B inter-domain interconnection [RFC4364], only ASBR
needs to do the stitching work between two ASes. Thus PEs in SRv6
and SR-MPLS domains do not have to support both SRv6 and SR-MPLS
functions. This document discusses the use of BGP for achieving VPN
service through option B defined in [RFC4364] across a backbone that
includes SRv6 and SR-MPLS domains.
2. Specification
2.1. SRv6 to SR-MPLS domain signaling
[I-D.ietf-bess-srv6-services] defines the new TLVs for the BGP
Prefix-SID Attribute that can be used to signaling of SRv6 SID for L3
and L2 services. In this document, we use L3 case as the example,
the procedures for L2 are the same as in L3 scenario.
Peng, et al. Expires April 26, 2020 [Page 2]
Internet-Draft BESS SPRING inter-domain VPN October 2019
+-------------+ +-------------+
| AS1 | | AS2 |
| | | |
CE1+----+PE1 ASBR1+---+ASBR2 PE2+----+CE2
| | | |
| SRV6 | | SR-MPLS |
+-------------+ +-------------+
Figure 1
For example, CE1 and CE2 are connected through a backbone that
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