TEAS Working Group A.Wang Internet Draft China Telecom Boris Khasanov Huawei Technologies Sudhir Cheruathur Juniper Networks Chun Zhu ZTE Company Intended status: Standard Track March 9,2017 Expires: September 8, 2017 PCEP Extension for Native IP Network draft-wang-pce-extension-native-ip-01.txt Status of this Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. This document may not be modified, and derivative works of it may not be created, and it may not be published except as an Internet-Draft. This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. This document may not be modified, and derivative works of it may not be created, except to publish it as an RFC and to translate it into languages other than English. It is for publication as an RFC or to translate it into languages other than English. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet- Drafts. 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." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt Expires December 30,2016 [Page 1] Internet-Draft PCE Extension for Native IP Network March 8, 2017 The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html This Internet-Draft will expire on September8, 201717. Copyright Notice Copyright (c) 2017 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 (http://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. Abstract This document defines the PCEP extension for PCE application in Native IP network. The scenario and architecture of PCE in native IP is described in [I-D.draft-wang-teas-pce-native-ip]. This draft describes the key information that is transferred between PCE and PCC to accomplish the end2end traffic assurance in Native IP network under central control mode. Table of Contents 1. Introduction ................................................ 2 2. Conventions used in this document ............................ 3 3. New Objects Extension......................................... 3 4. Object Formats. ............................................. 3 4.1. Peer Address List object................................ 4 4.2. Peer Prefix Association................................. 5 4.3. EXPLICIT PEER ROUTE Object.............................. 6 5. Management Consideration..................................... 7 6. Security Considerations...................................... 7 7. IANA Considerations ......................................... 7 8. Conclusions ................................................. 7 9. References .................................................. 7 9.1. Normative References .................................... 7 9.2. Informative References.................................. 8 10. Acknowledgments ............................................ 8 1. Introduction Traditionally, MPLS-TE traffic assurance requires the corresponding network devices support MPLS or the complex RSVP/LDP/Segment Routing Expires September 7, 2017 [Page 2] Internet-Draft PCE Extension for Native IP Network March 8, 2017 etc. technologies to assure the end-to-end traffic performance. But in native IP network, there will be no such signaling protocol to synchronize the action among different network devices. It is necessary to use the central control mode that described in [I- D.draft-ietf-teas-pce-control-function] to correlate the forwarding behavior among different network devices. Draft [I-D.draft-wang- teas-pce-native-ip] describes the architecture and solution philosophy for the end2end traffic assurance in Native IP network via Dual/Multi BGP solution. This draft describes the corresponding PCEP extension to transfer the key information about peer address list, peer prefix association and the explicit peer route on on-path router. 2. Conventions used in this document 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]. 3. New Objects Extension Three new objects are defined in this draft; they are Peer Address List Object (PAL Object), Peer Prefix Association Object (PPA Object) and Explicit Peer Route object (EPR Object). Peer Address List object is used to tell the network device which peer it should be peered with dynamically, Peer Prefix Association is used to tell which prefixes should be advertised via the corresponding peer and Explicit Peer Route object is used to point out which route should be to taken to arrive to the peer. 4. Object Formats. Each extension object takes the similar format, that is to say, it began with the common object header defined in [RFC5440] as the following: 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Object-Class | OT |Res|P|I| Object Length (bytes) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | Expires September 7, 2017 [Page 3] Internet-Draft PCE Extension for Native IP Network March 8, 2017 // (Object body) // | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Different object-class, object type and the corresponding object body is defined separated in the following section. 4.1. Peer Address List object. The Peer Address List object is used in a PCE Initiate message [draft-ietf-pce-pce-initiated-lsp] to specify the ip address of peer that the received network device should establish the BGP relationship with. This Object should only be sent to the head and end router of the end2end path in case there is no RR involved. If the RR is used between the head end routers, then such information should be sent to head router/RR and end router/RR respectively. Peer Address List object Object-Class is ** Peer Address List object Object-Type is ** 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Peer Num | Peer-Id | AT | Resv. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Local IP Address(4/16 Bytes) | // Peer IP Address(4/16 Bytes) // +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Peer Num (8 bits): Peer Address Number on the advertised router. Peer-Id(8 bits): To distinguish the different peer pair, will be referenced in Peer Prefix Association, if the PCE use multi-BGP solution for different QoS assurance requirement. Expires September 7, 2017 [Page 4] Internet-Draft PCE Extension for Native IP Network March 8, 2017 AT(8 bits): Address Type. To indicate the address type of Peer. Equal to 4, if the following IP address of peer is belong to IPv4; Equal to 6 if the following IP address of peer is belong to IPv6. Resv(8 bits): Reserved for future use. Local IP Address(4/16 Bytes): IPv4 address of the local router, used to peer with other end router. When AT equal to 4, length is 32bit; when AT equal to 16, length is 128bit; Peer IP Address(4/16 Bytes): IPv4 address of the peer router, used to peer with the local router. When AT equal to 4, length is 32bit; IPv6 address of the peer when AT equal to 16, length is 128bit; 4.2. Peer Prefix Association THE Peer Prefix Association object is carried within in a PCE Initiate message [draft-ietf-pce-pce-initiated-lsp] to specify the IP prefixes that should be advertised by the corresponding Peer. This Object should only be sent to the head and end router of the end2end path in case there is no RR involved. If the RR is used between the head end routers, then such information should be sent to head router/RR and end router/RR respectively. Peer Prefix Association object Object-Class is ** Peer Prefix Association object Object-Type is ** 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Peer-Id | AT | Resv. | Prefixes Num. +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Peer Associated IP Prefix TLV | // Peer Associated IP Prefix TLV // | Peer Associated IP Prefix TLV | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Expires September 7, 2017 [Page 5] Internet-Draft PCE Extension for Native IP Network March 8, 2017 Peer-Id(8 bits): To indicate which peer should be used to advertise the following IP Prefix TLV. This value is assigned in the Peer Address List object and is referred in this object. AT(8 bits): Address Type. To indicate the address type of Peer. Equal to 4, if the following IP address of peer is belong to IPv4; Equal to 6 if the following IP address of peer is belong to IPv6. Resv(8 bits): Reserved for future use. Prefixes Num(8 bits): Number of prefixes that advertised by the corresponding Peer. It should be equal to num of the following IP prefix TLV. Peer Associated IP Prefix TLV: Variable Length, use the TLV format to indicate the advertised IP Prefix. 4.3. EXPLICIT PEER ROUTE Object THE EXPLICIT PEER ROUTE Object is carried in a PCE Initiate message [draft-ietf-pce-pce-initiated-lsp] to specify the explicit peer route to the corresponding peer address on each device that is on the end2end assurance path. This Object should be sent to all the devices that locates on the end2end assurance path that calculated by PCE. EXPLICIT PEER ROUTE Object Object-Class is ** EXPLICIT PEER ROUTE Object Object-Type is ** 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Peer-Id | AT | Resv. | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Next Hop Address to the Peer (IPv4/IPv6) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ Expires September 7, 2017 [Page 6] Internet-Draft PCE Extension for Native IP Network March 8, 2017 Peer-Id(8 bits): To indicate the peer that the following next hop address point to. This value is assigned in the Peer Address List object and is referred in this object. AT(8 bits): Address Type. To indicate the address type of explicit peer route. Equal to 4, if the following next hop address to the peer is belong to IPv4; Equal to 6 if the following next hop address to the peer is belong to IPv6. Resv(16 bits): Reserved for future use. Next Hop Address to the Peer TLV: Variable Length, use the TLV format to indicate the next hop address to the corresponding peer that indicated by the Peer-Id. 5. Management Consideration. 6. Security Considerations TBD 7. IANA Considerations TBD 8. Conclusions TBD 9. References 9.1. Normative References [RFC4655] Farrel, A., Vasseur, J.-P., and J. Ash, "A Path Computation Element (PCE)-Based Architecture", RFC 4655, August 2006,. [RFC5440]Vasseur, JP., Ed., and JL. Le Roux, Ed., "Path Computation Element (PCE) Communication Protocol (PCEP)", RFC 5440, March 2009, Expires September 7, 2017 [Page 7] Internet-Draft PCE Extension for Native IP Network March 8, 2017 . 9.2. Informative References [I-D.draft-ietf-pce-pce-initiated-lsp-07] E.Crabbe, I.Minei, S.Sivabalan, R.Varga, "PCEP Extensions for PCE- initiated LSP Setup in a Stateful PCE Model", https://tools.ietf.org/html/draft-ietf-pce-pce-initiated-lsp-07 (work in progress), July, 2016 [I-D.draft-wang-teas-pce-native-ip] Aijun Wang, Quintin Zhao, Boris Khasanov, Raghavendra Mallya, Shaofu Peng "PCE in Native IP Network", https://tools.ietf.org/html/draft- wang-teas-pce-native-ip-02(work in progress), March, 2017 [I-D.draft-ietf-teas-pce-control-function] Farrel, Q.Zhao "An Architecture for use of PCE and PCEP in a Network with Central Control" https://tools.ietf.org/html/draft-ietf-teas-pce-central-control-01 (work in progress),December, 2016 10. Acknowledgments TBD Authors' Addresses Aijun Wang China Telecom Beiqijia Town, Changping District Beijing,China Email: wangaj.bri@chinatelecom.cn Boris Khasanov Huawei Technologies Moskovskiy Prospekt 97A St.Petersburg 196084 Russia EMail: khasanov.boris@huawei.com Expires September 7, 2017 [Page 8] Internet-Draft PCE Extension for Native IP Network March 8, 2017 Sudhir Cheruathur Juniper Networks 1133 Innovation Way Sunnyvale, California 94089 USA Email: scheruathur@juniper.net Chun Zhu ZTE Corporation 50 Software Avenue, Yuhua District Nanjing, Jiangsu 210012 China Email:zhu.chun1@zte.com.cn Expires September 7, 2017 [Page 9]