SF Aware TE Topology YANG Model
draft-ietf-teas-sf-aware-topo-model-04
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Network Working Group                                         I. Bryskin
Internet-Draft                                                Individual
Intended status: Informational                                    X. Liu
Expires: May 7, 2020                                      Volta Networks
                                                                  Y. Lee
                                               Sung Kyun Kwan University
                                                             J. Guichard
                                                     Huawei Technologies
                                                            L. Contreras
                                                              Telefonica
                                                           D. Ceccarelli
                                                                Ericsson
                                                             J. Tantsura
                                                         Apstra Networks
                                                        November 4, 2019

                    SF Aware TE Topology YANG Model
                 draft-ietf-teas-sf-aware-topo-model-04

Abstract

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

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on May 7, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Bryskin, et al.            Expires May 7, 2020                  [Page 1]
Internet-Draft          SF Aware Topo YANG Model           November 2019

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (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 . . . . . . . . . . . . . . . . . . . . . . .   4
     1.2.  Tree Diagrams . . . . . . . . . . . . . . . . . . . . . .   5
     1.3.  Prefixes in Data Node Names . . . . . . . . . . . . . . .   6
   2.  Modeling Considerations . . . . . . . . . . . . . . . . . . .   6
   3.  SF Aware TE Topology Model Structure  . . . . . . . . . . . .   7
   4.  SF Aware TE Topology YANG Module  . . . . . . . . . . . . . .   9
   5.  CSO Data Center Model Structure . . . . . . . . . . . . . . .  16
   6.  CSO Data Center YANG Module . . . . . . . . . . . . . . . . .  18
   7.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  23
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  24
   9.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  24
     9.1.  Normative References  . . . . . . . . . . . . . . . . . .  24
     9.2.  Informative References  . . . . . . . . . . . . . . . . .  26
   Appendix A.  Companion YANG Model for Non-NMDA Compliant
                Implementations  . . . . . . . . . . . . . . . . . .  27
     A.1.  SF Aware TE Topology State Module . . . . . . . . . . . .  27
   Appendix B.  Data Examples  . . . . . . . . . . . . . . . . . . .  30
     B.1.  A Topology with Multiple Connected Network Functions  . .  30
     B.2.  A Topology with an Encapsulated Network Service . . . . .  34
   Appendix C.  Use Cases for SF Aware Topology Models . . . . . . .  38
     C.1.  Exporting SF/NF Information to Network Clients and Other
           Network SDN Controllers . . . . . . . . . . . . . . . . .  38
     C.2.  Flat End-to-end SFCs Managed on  Multi-domain Networks  .  39
     C.3.  Managing SFCs with TE Constraints . . . . . . . . . . . .  40
     C.4.  SFC Protection and Load Balancing . . . . . . . . . . . .  41
     C.5.  Network Clock Synchronization . . . . . . . . . . . . . .  44
     C.6.  Client - Provider Network Slicing Interface . . . . . . .  44
     C.7.  Dynamic Assignment of Regenerators for L0 Services  . . .  44
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