PCE workgroup Fangwei Hu Internet-Draft Quan Xiong Intended status: Standards Track Greg Mirsky Expires: June 13, 2019 ZTE Corporation Weiqiang Cheng China Mobile Dec 10, 2018 Stitching LSP Association draft-hu-pce-stitching-lsp-association-00.txt Abstract This document defines the stitching LSP association type and stitching LSP association TLV for the inter-domain Segment Routing MPLS-TP network. 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 June 13, 2019. Copyright Notice Copyright (c) 2018 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 to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of Fangwei Hu, et al. Expires June 13, 2019 [Page 1] Internet-Draft Stitching LSP association Dec 2018 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Conventions used in this document . . . . . . . . . . . . . . 2 2.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 2 2.2. Requirements Language . . . . . . . . . . . . . . . . . . 2 3. Operation Overview . . . . . . . . . . . . . . . . . . . . . 3 4. Stitching LSP Association Group . . . . . . . . . . . . . . . 3 4.1. Stitching LSP Association Object . . . . . . . . . . . . 3 4.2. Stitching TLV format . . . . . . . . . . . . . . . . . . 3 5. Security Considerations . . . . . . . . . . . . . . . . . . . 4 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 4 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4 7.1. Association Types . . . . . . . . . . . . . . . . . . . . 4 7.2. Stitching Association TLV . . . . . . . . . . . . . . . . 4 8. Normative References . . . . . . . . . . . . . . . . . . . . 5 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6 1. Introduction [I-D.hu-mpls-sr-inter-domain-use-cases] provides stitching path label to indicate the the packet from the border nodes to forward to another AS domain. The border nodes should install the following MPLS data entries: incomging label: Stiching Path Label outgoing label: the SID list of the next AS domain + next Stitching Path label [I-D.xiong-pce-stateful-pce-sr-inter-domain] introduces the procedure and the PCEP extension to form the inter-domain MPLS-TP MPLS data entries. This document proposes the related LSP association group extension. 2. Conventions used in this document 2.1. Terminology 2.2. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here. Fangwei Hu, et al. Expires June 13, 2019 [Page 2] Internet-Draft Stitching LSP association Dec 2018 3. Operation Overview [I-D.ietf-pce-association-group] introduces a generic mechanism to create a grouping of LSPs. This grouping can then be used to define associations between sets of LSPs or between a set of LSPs and a set of attributes. This document proposes a new optional association object type called "stitching Association LSP type" and the related TLV called "stitching association LSP TLV" to form the inter-domain MPLS forwarding entry for the border nodes. As defined in [I-D.ietf-pce-association-group], stitching LSP Association could be created dynamically or configured by the operator when operator-configured association is needed. 4. Stitching LSP Association Group 4.1. Stitching LSP Association Object A new Association Type for the Association Object is defined in this document, Association Type (TBD) = Stitching Path Segment LSP Association Group. The Association Types is operator-configured associations in nature and statically created by the operator on the PCEP peers. The LSP belonging to these associations is conveyed via PCEP messages to the PCEP peer. Operator-configured Association Range TLV [I-D.ietf-pce-association-group] MUST NOT be sent for this Association Type, and MUST be ignored, so that the entire range of association ID can be used for it. The Association ID, Association Source, optional Global Association Source and optional Extended Association ID in the Stitching Path Segment LSP Association Group Object are initialized using the procedures defined in [I-D.ietf-pce-association-group] and [RFC7551]. 4.2. Stitching TLV format The format of the Stitching LSP Association Group TLV is shown in Figure 1. Fangwei Hu, et al. Expires June 13, 2019 [Page 3] Internet-Draft Stitching LSP association Dec 2018 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Type | Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Reserved | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Figure 1: Stitching LSP Association Group TLV The fields of the Stitching LSP Association Group TLV are following: Type:16bits, it indicates the stitching LSP Association Group TLV(TBD2, the value is assigned by IANA). Length: the value is 4, it indicates the length of the TLV is 4 bytes. Reserved: it is reserved for future use. 5. Security Considerations 6. Acknowledgements 7. IANA Considerations 7.1. Association Types IANA is requested to make the assignment of values for the sub- registry "ASSOCIATION Type Field" as follows: +--------+------------------+ | Value | Reference | +--------+------------------+ | TBD1 | [this document] | +--------+------------------+ Table 1 7.2. Stitching Association TLV This document defines a new TLV for carrying additional information of LSPs within a Stitching LSP Association Group. IANA is requested to add the assignment of a new value in the existing "PCEP TLV Type Indicators" registry as follows: Fangwei Hu, et al. Expires June 13, 2019 [Page 4] Internet-Draft Stitching LSP association Dec 2018 +-------+-------------------------------------+------------------+ | Type | Description | Reference | +-------+-------------------------------------+------------------+ | TBD2 | Stitching LSP Association Group TLV | [this document] | +-------+-------------------------------------+------------------+ Table 2 8. Normative References [I-D.cheng-spring-mpls-path-segment] Cheng, W., Wang, L., Li, H., Chen, M., Gandhi, R., Zigler, R., and S. Zhan, "Path Segment in MPLS Based Segment Routing Network", draft-cheng-spring-mpls-path-segment-03 (work in progress), October 2018. [I-D.hu-mpls-sr-inter-domain-use-cases] hu, f., Xiong, Q., Mirsky, G., and W. Cheng, "Segment Routing in MPLS-TP Inter-domain Use Cases", draft-hu-mpls- sr-inter-domain-use-cases-00 (work in progress), December 2018. [I-D.ietf-pce-association-group] Minei, I., Crabbe, E., Sivabalan, S., Ananthakrishnan, H., Dhody, D., and Y. Tanaka, "PCEP Extensions for Establishing Relationships Between Sets of LSPs", draft- ietf-pce-association-group-06 (work in progress), June 2018. [I-D.xiong-pce-stateful-pce-sr-inter-domain] Xiong, Q., hu, f., Mirsky, G., and W. Cheng, "Stateful PCE for SR-MPLS-TP Inter-domain", draft-xiong-pce-stateful- pce-sr-inter-domain-00 (work in progress), December 2018. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC7551] Zhang, F., Ed., Jing, R., and R. Gandhi, Ed., "RSVP-TE Extensions for Associated Bidirectional Label Switched Paths (LSPs)", RFC 7551, DOI 10.17487/RFC7551, May 2015, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . Fangwei Hu, et al. Expires June 13, 2019 [Page 5] Internet-Draft Stitching LSP association Dec 2018 Authors' Addresses Fangwei Hu ZTE Corporation No.889 Bibo Rd Shanghai 201203 China Phone: +86 21 68896273 Email: hu.fangwei@zte.com.cn Quan Xiong ZTE Corporation No.6 Huashi Park Rd Wuhan, Hubei 430223 China Phone: +86 27 83531060 Email: xiong.quan@zte.com.cn Greg Mirsky ZTE Corporation USA Email: gregimirsky@gmail.com Weiqiang Cheng China Mobile Beijing China Email: chengweiqiang@chinamobile.com Fangwei Hu, et al. Expires June 13, 2019 [Page 6]