SF Aware TE Topology YANG Model
draft-ietf-teas-sf-aware-topo-model-07
Document Type Active Internet-Draft (teas WG)
Authors Igor Bryskin  , Xufeng Liu  , Young Lee  , Jim Guichard  , Luis Contreras  , Daniele Ceccarelli  , Jeff Tantsura  , Dmytro Shytyi 
Last updated 2021-02-21
Replaces draft-bryskin-teas-sf-aware-topo-model
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Network Working Group                                         I. Bryskin
Internet-Draft                                                Individual
Intended status: Informational                                    X. Liu
Expires: August 25, 2021                                  Volta Networks
                                                                  Y. Lee
                                                     Samsung Electronics
                                                             J. Guichard
                                                     Huawei Technologies
                                                            L. Contreras
                                                              Telefonica
                                                           D. Ceccarelli
                                                                Ericsson
                                                             J. Tantsura
                                                         Apstra Networks
                                                               D. Shytyi
                                                                     SFR
                                                       February 21, 2021

                    SF Aware TE Topology YANG Model
                 draft-ietf-teas-sf-aware-topo-model-07

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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at https://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   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 August 25, 2021.

Bryskin, et al.          Expires August 25, 2021                [Page 1]
Internet-Draft          SF Aware Topo YANG Model           February 2021

Copyright Notice

   Copyright (c) 2021 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
   (https://trustee.ietf.org/license-info) in effect on the date of
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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.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  16
   6.  Security Considerations . . . . . . . . . . . . . . . . . . .  17
   7.  References  . . . . . . . . . . . . . . . . . . . . . . . . .  18
     7.1.  Normative References  . . . . . . . . . . . . . . . . . .  18
     7.2.  Informative References  . . . . . . . . . . . . . . . . .  21
   Appendix A.  Companion YANG Model for Non-NMDA Compliant
                Implementations  . . . . . . . . . . . . . . . . . .  22
     A.1.  SF Aware TE Topology State Module . . . . . . . . . . . .  22
   Appendix B.  Data Examples  . . . . . . . . . . . . . . . . . . .  25
     B.1.  A Topology with Multiple Connected Network Functions  . .  25
     B.2.  A Topology with an Encapsulated Network Service . . . . .  29
   Appendix C.  Use Cases for SF Aware Topology Models . . . . . . .  33
     C.1.  Exporting SF/NF Information to Network Clients and Other
           Network SDN Controllers . . . . . . . . . . . . . . . . .  33
     C.2.  Flat End-to-end SFCs Managed on  Multi-domain Networks  .  34
     C.3.  Managing SFCs with TE Constraints . . . . . . . . . . . .  35
     C.4.  SFC Protection and Load Balancing . . . . . . . . . . . .  36
     C.5.  Network Clock Synchronization . . . . . . . . . . . . . .  39
     C.6.  Client - Provider Network Slicing Interface . . . . . . .  39
     C.7.  Dynamic Assignment of Regenerators for L0 Services  . . .  39
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