Segment routing for SD-WAN paths over hybrid networks
draft-dunbar-sr-sdwan-over-hybrid-networks-02

Document Type Active Internet-Draft (individual)
Last updated 2018-07-02
Stream (None)
Intended RFC status (None)
Formats plain text pdf html bibtex
Stream Stream state (No stream defined)
Consensus Boilerplate Unknown
RFC Editor Note (None)
IESG IESG state I-D Exists
Telechat date
Responsible AD (None)
Send notices to (None)
Network Working Group                                         L. Dunbar
Internet Draft                                                   Huawei
Intended status: Informational                               Mehmet Toy
Expires: January 2019                                           Verizon
                                                           July 2, 2018

           Segment routing for SD-WAN paths over hybrid networks
               draft-dunbar-sr-sdwan-over-hybrid-networks-02

Abstract

   This document describes a method for end-to-end (E2E) SD-WAN paths
   (most likely encrypted) to traverse specific list of network
   segments, some of which are SR enabled and others may be IP networks
   that do not support SR, to achieve the desired optimal E2E quality.

   The method described in this draft uses the principle of segment
   routing to enforce a SD-WAN path' head-end selected route traversing
   through a list of specific nodes of multiple network segments
   without requiring the nodes in each network segment to have the
   intelligence (or maintaining states) of selecting next hop or next
   domain. Those networks over which the SD-WAN path traverse have at
   least one SR enabled network, and some network segments (especially
   the last mile access portion) being existing IP networks (such as
   existing IPv4, IPv6 or others).

Status of this Memo

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

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79. This document may not be modified,
   and derivative works of it may not be created, except to publish it
   as an RFC and to translate it into languages other than English.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups.  Note that

xxx, et al.            Expires January 2, 2019                 [Page 1]
Internet-Draft       SD-WAN over multiple domains             July 2018

   other groups may also distribute working documents as Internet-
   Drafts.

   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."

   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt

   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html

   This Internet-Draft will expire on January 2, 2009.

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
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document. Please review these documents
   carefully, as they describe your rights and restrictions with
   respect to this document. Code Components extracted from this
   document must include Simplified BSD License text as described in
   Section 4.e of the Trust Legal Provisions and are provided without
   warranty as described in the Simplified BSD License.

Table of Contents

   1. Introduction...................................................3
   2. Definition of terms............................................4
   3. Key Use Cases..................................................5
      3.1. SD-WAN Path over LTE network and SR Domain................5
      3.2. SD-WAN As Last Mile for Cloud DCs Access..................6
      3.3. How & Why SR is useful for those use cases................7

Dunbar, et al.           Expires June 2, 2018                  [Page 2]
Internet-Draft       SD-WAN over multiple domains             July 2018

   4. Mechanism for SD-WAN path over one SR Domain and existing access
   ..................................................................8
      4.1. Controller Delivers SID Stack to SD-WAN Head-end..........9
      4.2. Using GRE Key to Differentiate Flows.....................11
      4.3. Using UDP Source Port Number to Differentiate Flows......12
      4.4. GRE Header Extension.....................................15
   5. SD-WAN path over multiple SP managed domains..................16
      5.1. When Both SP domains support SR..........................17
      5.2. When SP-2 does not support SR............................17
      5.3. When SP-1 and SP-2 don't want to share network information18
      5.4. TLV to pass Metadata through SRv6 Domain.................18
   6. Security Considerations.......................................19
   7. IANA Considerations...........................................20
   8. References....................................................20
Show full document text