Architecture of Dynamic-Anycast in Compute First Networking (CFN- Dyncast)
draft-li-rtgwg-cfn-dyncast-architecture-00

Document Type Active Internet-Draft (individual)
Authors Li Yizhou  , Luigi Iannone  , Jianfei(Jeffrey) HE  , Liang Geng  , Peng Liu  , Yong Cui 
Last updated 2020-10-31
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rtgwg                                                              Y. Li
Internet-Draft                                                L. Iannone
Intended status: Informational                       Huawei Technologies
Expires: May 4, 2021                                               J. He
                                            City University of Hong Kong
                                                                 L. Geng
                                                                  P. Liu
                                                            China Mobile
                                                                  Y. Cui
                                                     Tsinghua University
                                                        October 31, 2020

   Architecture of Dynamic-Anycast in Compute First Networking (CFN-
                                Dyncast)
               draft-li-rtgwg-cfn-dyncast-architecture-00

Abstract

   Compute First Networking (CFN) Dynamic Anycast refers to in-network
   edge computing, where a single service offered by a provider has
   multiple instances attached to multiple edge sites.  In this
   scenario, flows are assigned and consistently forwarded to a specific
   instance through an anycast approach based on the network status as
   well as the status of the different instance.

   This document describes an architecture for the Dynamic Anycast
   (Dyncast) in Compute First Networking (CFN).  It provides an
   overview, a description of the various components, and a workflow
   example showing how to provide a balanced multi-edge based service in
   terms of both computing and networking resources through dynamic
   anycast in real time.

Status of This Memo

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Li, et al.                 Expires May 4, 2021                  [Page 1]
Internet-Draft          CFN-dyncast Architecture            October 2020

   This Internet-Draft will expire on May 4, 2021.

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Definition of Terms . . . . . . . . . . . . . . . . . . . . .   3
   3.  CFN-Dyncast Architecture Overview . . . . . . . . . . . . . .   4
   4.  Architectural Components and Interactions . . . . . . . . . .   5
     4.1.  Service Identity and Bindings . . . . . . . . . . . . . .   5
     4.2.  Service Notification between Instances and CFN node . . .   7
     4.3.  CFN Dyncast Control Plane . . . . . . . . . . . . . . . .   9
     4.4.  Service Demand Dispatching  . . . . . . . . . . . . . . .   9
     4.5.  CFN Dispatcher  . . . . . . . . . . . . . . . . . . . . .  10
   5.  Summary of the key elements of CFN Dyncast Architecture . . .  12
   6.  Conclusion (and call for contributions) . . . . . . . . . . .  13
   7.  Security Considerations . . . . . . . . . . . . . . . . . . .  13
   8.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  13
   9.  Informative References  . . . . . . . . . . . . . . . . . . .  14
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  14
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  14

1.  Introduction

   Dynamic anycast in Compute First Networking (CFN-Dyncast) use cases
   and problem statements document
   [I-D.geng-rtgwg-cfn-dyncast-ps-usecase] shows the usage scenarios
   that require an edge to be dynamically selected from multiple edge
   sites to serve an edge computing service demand based on computing
   resource available at the site and network status in real time.
   Multiple edges provide service equivalency and service dynamism in
   CFN.  The current network architecture in edge computing provides
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