SF Aware TE Topology YANG Model
draft-ietf-teas-sf-aware-topo-model-03
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Network Working Group                                         I. Bryskin
Internet-Draft                                       Huawei Technologies
Intended status: Informational                                    X. Liu
Expires: September 12, 2019                               Volta Networks
                                                                  Y. Lee
                                                             J. Guichard
                                                     Huawei Technologies
                                                            L. Contreras
                                                              Telefonica
                                                           D. Ceccarelli
                                                                Ericsson
                                                             J. Tantsura
                                                         Apstra Networks

                                                          March 11, 2019

                    SF Aware TE Topology YANG Model
                 draft-ietf-teas-sf-aware-topo-model-03

Abstract

   This document describes a YANG data model for TE network topologies
   that are network service and function aware.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on September 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents

Bryskin, et al.          Expires September 2019                 [Page 1]
Internet-Draft          SF Aware Topo YANG Model          March 2019

   (https://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
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   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Terminology . . . . . . . . . . . . . . . . . . . . . . .   3
     1.2.  Tree Diagrams . . . . . . . . . . . . . . . . . . . . . .   5
     1.3.  Prefixes in Data Node Names . . . . . . . . . . . . . . .   5
   2.  Modeling Considerations . . . . . . . . . . . . . . . . . . .   6
   3.  Model Structure . . . . . . . . . . . . . . . . . . . . . . .   7
   4.  YANG Modules  . . . . . . . . . . . . . . . . . . . . . . . .   8
   5.  Model Structure . . . . . . . . . . . . . . . . . . . . . . .  15
   6.  YANG Modules  . . . . . . . . . . . . . . . . . . . . . . . .  17
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  22
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  23
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  23
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  23
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  24

   Appendix A.  Companion YANG Model for Non-NMDA Compliant
                Implementations  . . . . . . . . . . . . . . . . . .  26
     A.1.  SF Aware TE Topology State Module . . . . . . . . . . . .  26
   Appendix B.  Data Examples  . . . . . . . . . . . . . . . . . . .  28
     B.1.  A Topology with Multiple Connected Network Functions  . .  28
     B.2.  A Topology with an Encapsulated Network Service . . . . .  33
   Appendix C.  Use Cases for SF Aware Topology Models . . . . . . .  37
     C.1.  Exporting SF/NF Information to Network Clients and Other
           Network SDN Controllers . . . . . . . . . . . . . . . . .  37
     C.2.  Flat End-to-end SFCs Managed on  Multi-domain Networks  .  38
     C.3.  Managing SFCs with TE Constraints . . . . . . . . . . . .  39
     C.4.  SFC Protection and Load Balancing . . . . . . . . . . . .  40
     C.5.  Network Clock Synchronization . . . . . . . . . . . . . .  43
     C.6.  Client - Provider Network Slicing Interface . . . . . . .  43
     C.7.  Dynamic Assignment of Regenerators for L0 Services  . . .  43
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