Control-Plane and User-Plane Separation BNG Simple Control Channel Protocol (S-CUSP)
draft-cuspdt-rtgwg-cu-separation-bng-protocol-06

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INTERNET-DRAFT                                                     S. Hu
Intended status: Proposed Standard                          China Mobile
                                                             D. Eastlake
                                                  Futurewei Technologies
                                                                 M. Chen
                                                     Huawei Technologies
                                                                  F. Qin
                                                                   Z. Li
                                                            China Mobile
                                                                 T. Chua
                                            Singapore Telecommunications
                                                                D. Huang
                                                                     ZTE
Expires: January 2, 2020                                    July 3, 2019

              Control-Plane and User-Plane Separation BNG
                Simple Control Channel Protocol (S-CUSP)
            draft-cuspdt-rtgwg-cu-separation-bng-protocol-06

Abstract

   This document specifies the Simple Control Plane (CP) and User Plane
   (UP) Separation Broadband Network Gateway (BNG) control channel
   Protocol (S-CUSP) for communications between a CP and a UP. S-CUSP is
   designed to be flexible and extensible so as to easily allow for the
   addition of further messages and data items to meet future
   requirements.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

   Distribution of this document is unlimited. Comments should be sent
   to the authors or the RGTWG working group mailing list:
   rtgwg@ietf.org.

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Hu, et al                                                       [Page 1]
INTERNET-DRAFT                                           Simple BNG CUSP

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Hu, et al                                                       [Page 2]
INTERNET-DRAFT                                           Simple BNG CUSP

Table of Contents

      1. Introduction............................................6

      2. Terminology.............................................7
        2.1 Implementation Requirement Keywords..................7
        2.2 Terms................................................7

      3. BNG CUPS Overview......................................10
        3.1 BNG CUPS Motivation.................................10
        3.2 BNG CUPS Architecture Overview......................10
        3.3 BNG CUPS Interfaces.................................12
        3.3.1 Service Interface.................................13
        3.3.2 Control Interface.................................14
        3.3.3 Management Interface..............................14
        3.4 BNG CUPS Procedure Overview.........................14

      4. S-CUSP Protocol Overview...............................18
        4.1 Control Channel Related Procedures..................18
        4.1.1 S-CUSP Session Establishment......................18
        4.1.2 Keep Alive........................................19
        4.2 Node Related Procedures.............................20
        4.2.1 UP Resource Report................................20
        4.2.2 Update BAS Function on Access Interface...........21
        4.2.3 Update Network Routing............................21
        4.2.4 CGN Public IP Address Allocation..................22
        4.2.5 Data Synchronization between the CP and UP........23
        4.3 Subscriber Session Related Procedures...............24
        4.3.1 Create Subscriber Session.........................25
        4.3.2 Update Subscriber Session.........................26
        4.3.3 Delete Subscriber Session.........................27
        4.3.4 Subscriber Session Events Report..................27

      5. S-CUSP Call Flows......................................29
        5.1 IPoE................................................29
        5.1.1 DHCPv4 Access.....................................29
        5.1.2 DHCPv6 Access.....................................30
        5.1.3 IPv6 SLAAC Access.................................32
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