neotec R. Pang, Ed. Internet-Draft T. He, Ed. Intended status: Standards Track China Unicom Expires: 20 April 2025 17 October 2024 Service Funciton Orchestration Interface for Cloud Network Collaboration draft-pang-sfc-interface-cnc-00 Abstract This document focuses on interface requirements between network controller and service function orchestrator, as well as between cloud controller and service function orchestrator. 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 20 April 2025. Copyright Notice Copyright (c) 2024 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 Revised BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Revised BSD License. Pang & He Expires 20 April 2025 [Page 1] Internet-Draft SFO Interface for CNC October 2024 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 2 1.2. Requirements Language . . . . . . . . . . . . . . . . . . 2 2. Background and Motivation . . . . . . . . . . . . . . . . . . 2 3. Architecture of service function chaining orchestration . . . 3 3.1. Service Overview . . . . . . . . . . . . . . . . . . . . 4 3.2. Work Flow Overview . . . . . . . . . . . . . . . . . . . 4 4. Security Considerations . . . . . . . . . . . . . . . . . . . 4 5. Normative References . . . . . . . . . . . . . . . . . . . . 4 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 4 1. Introduction In the background of cloud network collaboration, an increasing number of value-added service functions in operator networks need to be deployed on demand or dynamically adjusted. These service functions , such as FW, WAF, etc. can be deployed in the central cloud resource pool or at the edge of user networks. Therefore, when conducting service function orchestration, it is necessary to exchange information with cloud controller and network controller. Therefore, it is necessary to standardize the interface requirements between network controller and service function orchestration, as well as the interface between cloud controller and service function orchestration. 1.1. Terminology 1.2. 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. 2. Background and Motivation Cloud network collaboration(CNC) is a collaborative work mode based on cloud computing and network technology, which connects users, devices, and cloud services through the network, enabling users and devices to efficiently share cloud data, files, applications, and resources, and work together in real-time, achieving cross regional, cross organizational, and cross platform collaborative cooperation, improving work efficiency and enterprise competitiveness. Pang & He Expires 20 April 2025 [Page 2] Internet-Draft SFO Interface for CNC October 2024 With the development of network and business, there is a growing need to deploy and dynamically adjust various value-added service functions on demand, such as FW, WAF, etc. Initially, these service functions can be deployed either in a central cloud resource pool or at the edge of the user network. However, with the continuous improvement of network performance requirements such as network quality and request delay, the need for flexible scaling of service functions has also increased. Simultaneously, the advancement of edge computing technology has prompted operators to deploy service functions across multiple edge nodes as per requirement. These edge nodes collaborate seamlessly through the network and use SFC technology to connect service functions. This approach not only fulfills users' need for flexible scheduling of service functions, but reduces response time, optimizes resource allocation, and enhances network efficiency. Based on the requirements of service function chaining, it is necessary to define interface requirements between network controller, cloud controller and service function orchestrator. 3. Architecture of service function chaining orchestration +------------------------------------------+ | service function orchestrator | | | +------------------------------------------+ R1 / \ R2 +-----------------------+ +----------------------+ | network controller | | cloud controlle | | | | | +-----------------------+ +----------------------+ | | +-----------------------+ +-----------------------+ |network infrastructure | | cloud infrastructure | | | | | +-----------------------+ +-----------------------+ Figure 1: Architecture of SFC orchestration The service function orchestrator is connected with the network controller and cloud control. The service function orchestrator obtains network information from the network controller through R1 and obtains computing resource pool information cloud controller from through R2, including value-added services that can be provided by the cloud infrastructure. Pang & He Expires 20 April 2025 [Page 3] Internet-Draft SFO Interface for CNC October 2024 The service function orchestrator is mainly focus on service orchestrating based on network resources and computing resources which are mentioned above. According to users’ service requirements, orchestration system selects the suitable computing resources to provide services and decide the service path. The orchestration system stores network information, service information and computing resources. 3.1. Service Overview TBD 3.2. Work Flow Overview TBD 4. Security Considerations TBD 5. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . Authors' Addresses Pang Ran (editor) China Unicom Beijing China Email: pangran@chinaunicom.cn Tao He (editor) China Unicom Beijing China Email: het21@chinaunicom.cn Pang & He Expires 20 April 2025 [Page 4]