DetNet Working Group G. Mirsky Internet-Draft ZTE Corp. Intended status: Informational M. Chen Expires: January 8, 2020 Huawei July 7, 2019 Operations, Administration and Maintenance (OAM) for Deterministic Networks (DetNet) with IP Data Plane draft-mirsky-detnet-ip-oam-00 Abstract This document defines the principals for using Operations, Administration, and Maintenance protocols and mechanisms in the Deterministic Networking networks with IP data plane. 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 January 8, 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 to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Mirsky & Chen Expires January 8, 2020 [Page 1]
Internet-Draft OAM for DetNet over IP July 2019 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 2. Conventions used in this document . . . . . . . . . . . . . . 2 2.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 2 2.2. Keywords . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Active OAM for DetNet Networks with IP Data Plane . . . . . . 3 4. Use of Hybrid OAM in DetNet . . . . . . . . . . . . . . . . . 4 5. OAM of DetNet IP Interworking with OAM of DetNet MPLS . . . . 4 6. OAM of DetNet IP Interworking with OAM of TSN . . . . . . . . 4 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 4 8. Security Considerations . . . . . . . . . . . . . . . . . . . 4 9. Acknowledgment . . . . . . . . . . . . . . . . . . . . . . . 4 10. References . . . . . . . . . . . . . . . . . . . . . . . . . 5 10.1. Normative References . . . . . . . . . . . . . . . . . . 5 10.2. Informational References . . . . . . . . . . . . . . . . 5 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6 1. Introduction [I-D.ietf-detnet-architecture] introduces and explains Deterministic Networks (DetNet) architecture. Operations, Administration and Maintenance (OAM) protocols are used to detect, localize defects in the network, and monitor network performance. Some OAM functions, e.g., failure detection, work in the network proactively, while others, e.g., defect localization, usually performed on-demand. These tasks achieved by a combination of active and hybrid, as defined in [RFC7799], OAM methods. [I-D.mirsky-detnet-oam] lists the functional requirements toward OAM for DetNet domain. The list can further be used for gap analysis of available OAM tools to identify possible enhancements of existing or whether new OAM tools are required to support proactive and on-demand path monitoring and service validation. Also, the document defines the OAM use principals for the DetNet networks with IP data plane. 2. Conventions used in this document 2.1. Terminology The term "DetNet OAM" used in this document interchangeably with longer version "set of OAM protocols, methods and tools for Deterministic Networks". DetNet Deterministic Networks DiffServ Differentiated Services Mirsky & Chen Expires January 8, 2020 [Page 2]
Internet-Draft OAM for DetNet over IP July 2019 DSCP DiffServ Code Point OAM: Operations, Administration and Maintenance PREF Packet Replication and Elimination Function POF Packet Ordering Function RDI Remote Defect Indication Underlay Network or Underlay Layer: The network that provides connectivity between the DetNet nodes. MPLS network providing LSP connectivity between DetNet nodes is an example of the underlay layer. DetNet Node - a node that is an actor in the DetNet domain. DetNet domain edge node and node that performs PREF within the domain are examples of DetNet node. 2.2. Keywords 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. 3. Active OAM for DetNet Networks with IP Data Plane OAM protocols and mechanisms act within the data plane of the particular networking layer. And thus it is critical that the data plane encapsulation supports OAM mechanisms in such a way that DetNet OAM packets are in-band with a DetNet flow being monitored, i.e., DetNet OAM test packets follow precisely the same path as DetNet data plane traffic both for unidirectional and bi-directional DetNet paths. The DetNet data plane encapsulation in a transport network with IP encapsulations specified in [I-D.ietf-detnet-ip]. For the IP underlay network, DetNet flows are identified by the 6-tuple that is the destination IP address, source IP address, IP protocol, source port number, destination port number, and differentiated services (DiffServ) code point (DSCP). Active IP OAM protocols like Bidirectional Forwarding Detection (BFD) [RFC5880] or STAMP [I-D.ietf-ippm-stamp], use UDP transport and the well-known UDP port numbers as the destination port. Thus a DetNet node should be able to associate an IP DetNet flow with the particular test session to Mirsky & Chen Expires January 8, 2020 [Page 3]
Internet-Draft OAM for DetNet over IP July 2019 ensure that test packets experience the same treatment as the DetNet flow packets. 4. Use of Hybrid OAM in DetNet Hybrid OAM methods are used in performance monitoring and defined in [RFC7799] as: Hybrid Methods are Methods of Measurement that use a combination of Active Methods and Passive Methods. A hybrid measurement method may produce metrics as close to passive, but it still alters something in a data packet even if that is the value of a designated field in the packet encapsulation. One example of such a hybrid measurement method is the Alternate Marking method (AMM) described in [RFC8321]. One of the advantages of the use of AMM in a DetNet domain with IP data plane is that the marking is applied to a data flow, thus ensuring that a measured metrics are directly applicable to the DetNet flow. 5. OAM of DetNet IP Interworking with OAM of DetNet MPLS TBA 6. OAM of DetNet IP Interworking with OAM of TSN TBA 7. IANA Considerations This document does not have any requests for IANA allocation. This section can be deleted before the publication of the draft. 8. Security Considerations This document describes the applicability of the existing Fault Management and Performance Monitoring IP OAM protocols, and does not raise any security concerns or issues in addition to ones common to networking or already documented for the referenced OAM protocols. 9. Acknowledgment TBA Mirsky & Chen Expires January 8, 2020 [Page 4]
Internet-Draft OAM for DetNet over IP July 2019 10. References 10.1. Normative References [I-D.ietf-detnet-architecture] Finn, N., Thubert, P., Varga, B., and J. Farkas, "Deterministic Networking Architecture", draft-ietf- detnet-architecture-13 (work in progress), May 2019. [I-D.ietf-detnet-ip] Varga, B., Farkas, J., Berger, L., Fedyk, D., Malis, A., Bryant, S., and J. Korhonen, "DetNet Data Plane: IP", draft-ietf-detnet-ip-01 (work in progress), July 2019. [I-D.ietf-detnet-ip-over-mpls] Varga, B., Farkas, J., Berger, L., Fedyk, D., Malis, A., Bryant, S., and J. Korhonen, "DetNet Data Plane: IP over MPLS", draft-ietf-detnet-ip-over-mpls-01 (work in progress), July 2019. [I-D.ietf-detnet-ip-over-tsn] Varga, B., Farkas, J., Malis, A., Bryant, S., and J. Korhonen, "DetNet Data Plane: IP over IEEE 802.1 Time Sensitive Networking (TSN)", draft-ietf-detnet-ip-over- tsn-00 (work in progress), May 2019. [I-D.mirsky-detnet-oam] Mirsky, G. and M. Chen, "Operations, Administration and Maintenance (OAM) for Deterministic Networks (DetNet)", draft-mirsky-detnet-oam-03 (work in progress), May 2019. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, <https://www.rfc-editor.org/info/rfc2119>. [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, <https://www.rfc-editor.org/info/rfc8174>. 10.2. Informational References [I-D.ietf-ippm-stamp] Mirsky, G., Jun, G., Nydell, H., and R. Foote, "Simple Two-way Active Measurement Protocol", draft-ietf-ippm- stamp-06 (work in progress), April 2019. Mirsky & Chen Expires January 8, 2020 [Page 5]
Internet-Draft OAM for DetNet over IP July 2019 [RFC5880] Katz, D. and D. Ward, "Bidirectional Forwarding Detection (BFD)", RFC 5880, DOI 10.17487/RFC5880, June 2010, <https://www.rfc-editor.org/info/rfc5880>. [RFC7799] Morton, A., "Active and Passive Metrics and Methods (with Hybrid Types In-Between)", RFC 7799, DOI 10.17487/RFC7799, May 2016, <https://www.rfc-editor.org/info/rfc7799>. [RFC8321] Fioccola, G., Ed., Capello, A., Cociglio, M., Castaldelli, L., Chen, M., Zheng, L., Mirsky, G., and T. Mizrahi, "Alternate-Marking Method for Passive and Hybrid Performance Monitoring", RFC 8321, DOI 10.17487/RFC8321, January 2018, <https://www.rfc-editor.org/info/rfc8321>. Authors' Addresses Greg Mirsky ZTE Corp. Email: gregimirsky@gmail.com Mach(Guoyi) Chen Huawei Email: mach.chen@huawei.com Mirsky & Chen Expires January 8, 2020 [Page 6]