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Liaison statement
LS on the new work item on “Requirements and framework of Service Function Orchestration based on SFC (Y.SFO)”

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State Posted
Submitted Date 2022-01-18
From Group ITU-T-SG-13
From Contact Tatiana Kurakova
To Group IETF
To Contacts The IETF Chair <>
Cc Scott Mansfield <>
The IETF Chair <>
The IESG <>
Purpose For information
Attachments sp16-sg13-oLS-00249.docx
During the ITU-T SG13 meeting (Virtual, 29 November-10 December 2021), Q2/13
(Next-generation network (NGN) evolution with innovative technologies including
software-defined networking (SDN) and network function virtualization (NFV))
created a new work item on “Requirements and framework of service function
orchestration based on Service Function Chain” (Y.SFO: TD697(WP3/13)).

ITU-T Y.SFO aims to provide the scenarios of service function orchestration
based on Service Function Chain (SFC), such as based on user requirement, to
realize function services deployed and dynamically adjusted on demand and based
on resource situation, to realize the resource optimization and load balance of
service functions, specifies its general requirements and provide a basic

The Y.SFO has some relationship to the following ITU-T Recommendations [ITU-T
Y.2012], [ITU-T Y.2324], [ITU-T Y.2501] for its requirements, capabilities,
functional architectures and Q.CPN. In addition, Y.SFO also has some
relationship to IETF RFC7665 and the ongoing draft “A Framework for
Constructing Service Function Chaining Systems Based on Segment Routing” for
the encapsulation and generation of Service Function Chain.

ITU-T Q2/13 would like to thank you for your attention, feedback and
cooperation on this topic.