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.
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This Internet-Draft will expire on 20 April 2025.
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document authors. All rights reserved.
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Internet-Draft Service Function Chaining based on SRv6 October 2024
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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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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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