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Use Cases and Requirements for Service Function Chaining based on SRv6 in cloud.
draft-hy-srv6ops-sfc-in-cloud-uc-00

Document Type Active Internet-Draft (individual)
Authors Tao He , Xinxin Yi
Last updated 2024-10-16
Replaces draft-he-yi-srv6ops-ipv6-enhancemnet-in-cloud-uc
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draft-hy-srv6ops-sfc-in-cloud-uc-00
srv6ops                                                       T. He, Ed.
Internet-Draft                                                X. Yi, Ed.
Intended status: Informational                              China Unicom
Expires: 20 April 2025                                   17 October 2024

 Use Cases and Requirements for Service Function Chaining based on SRv6
                               in cloud.
                  draft-hy-srv6ops-sfc-in-cloud-uc-00

Abstract

   This document outlines the usecase for implementing Service Function
   Chaining(SFC) based on SRv6 in cloud, motivated by the increasing
   demand for collabration between cloud and network.  The capabilities
   of SRv6 in most cloud service are not ready, such as SFC based on
   SRv6.  If we want to realize these capabilities of SRv6 end-to-end,
   virtual routers(VR) can be deployed as an agent which support SRv6 in
   the cloud.

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
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   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.

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   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.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Use cases and scheme  . . . . . . . . . . . . . . . . . . . .   2
     2.1.  SFC based on SRv6 . . . . . . . . . . . . . . . . . . . .   2
   3.  Conclusion  . . . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   4
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   4
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .   4
   Contributors  . . . . . . . . . . . . . . . . . . . . . . . . . .   4
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   4

1.  Introduction

   With the rapid development of IPv6 and IPv6 extention protocol, the
   carrier network has basically completed the deployment of them.
   However, in most clouds, IPv4 protocol is still used, and
   IPv6,especially IPv6 extention protocol have not been achieved to
   end-to-end deployment.  In order to promote capabilities of IPv6 and
   IPv6 enhancement into the network end-to-end,such as the capability
   of SFC based on SRv6, we should upgrade the according device and
   system in the cloud.  But considering the upgrading of network
   hardware devices and business systems in the cloud will take a long
   time and cost a lot, we propose a scheme to deploy a VR in the cloud
   to support SRv6 and act as an agent for the application in the cloud,
   so that it can realize the end-to-end SFC based on SRv6.

2.  Use cases and scheme

2.1.  SFC based on SRv6

   Nowadays, operators are actively evolving from traditional
   communication service providers to integrated information service
   enterprises.  Operators need to organize a large number of value-
   added services in the cloud such as security service product to meet
   the security requirements of enterprises on the enterprise private
   line.  We can use SFC to achieve this capability and the security
   service can be added and deleted on SFC easily.  At present, SRv6
   capability is the best choice for SFC on the enterprise private line,

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   but various security services can not support the capability of SRv6
   in the cloud, so we need to use a device as SRv6 agent and interact
   with security services.  Traditionally, we use a router in the
   carrier network as the SRv6 agent to achieve it.  However in this
   scenario, accompany with the increase of the security services, the
   flow between cloud and carrier network multiply.  As shown in the
   Figure 1.

                                  (~~~~~~~~~~~~~~~~~~~~~~~~~)
                                 (           Cloud1          )
                                (    +--------+  +--------+   )
                               (     |Service1|  |Service2|    )
                                (    +--------+  +--------+   )
                                 (      *             *      )
                                  (~~~~~~*~~~~~~~~~~~*~~~~~~)
                                          *    |    *
                                           *   |   *
                                            *  |  *
                                          +--------+
                                          | Router |
                                          +--------+

                                           Figure 1

   And moreover, considering the time and ecomomic costs, we have
   adopted a more flexible approach.In Chinaunicom's network, we deploy
   VR in the cloud as SRv6 agents of security services, so that we can
   decrease the flow between cloud and carrier network, and it can be
   deployed simply and flexibly.  As shown in the Figure 2.

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                                  (~~~~~~~~~~~~~~~~~~~~~~~~~)
                                 (           Cloud1          )
                                (    +--------+  +--------+   )
                               (     |Service1|  |Service2|    )
                              (      +--------+  +--------+     )
                             (          \              /         )
                              (          \            /         )
                               (          +---------+          )
                                (         |   VR    |         )
                                 (        +---------+        )
                                  (~~~~~~~~~~~~~~~~~~~~~~~~~)
                                               |
                                               |
                                               |
                                          +--------+
                                          | Router |
                                          +--------+

                                           Figure 2

3.  Conclusion

   Generally, in order to introduce SRv6 capability into the cloud,
   realize the end-to-end capability of SFC based on SRv6, we use VR to
   bring quick and flexible update, which benefits the business with
   fast evolution.

4.  Security Considerations

   TBD.

5.  IANA Considerations

   TBD.

Acknowledgements

   TBD.

Contributors

   TBD.

Authors' Addresses

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Internet-Draft   Service Function Chaining based on SRv6    October 2024

   Tao He (editor)
   China Unicom
   Beijing
   China
   Email: het21@chinaunicom.cn

   Xinxin Yi (editor)
   China Unicom
   Beijing
   China
   Email: yixx3@chinaunicom.cn

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