Seamless Interconnect Underlay to Cloud Overlay Problem Statement
draft-ietf-rtgwg-net2cloud-problem-statement-00

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Last updated 2019-02-12
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Network Working Group                                         L. Dunbar
Internet Draft                                                 A. Malis
Intended status: Informational                                   Huawei
Expires: July  2019                                        C. Jacquenet
                                                                 Orange
                                                                 M. Toy
                                                                Verizon
                                                      February 12, 2019

     Seamless Interconnect Underlay to Cloud Overlay Problem Statement
                  draft-ietf-rtgwg-net2cloud-problem-statement-00

Abstract

   This document describes the problems that enterprises face today
   when connecting their branch offices to dynamic workloads in third
   party data centers (a.k.a. Cloud DCs).

   It examines some of the approaches interconnecting cloud DCs with
   enterprises' on-premises DCs & branch offices. This document also
   describes some of the (network) problems that many enterprises face
   when they have workloads & applications & data split among hybrid
   data centers, especially for those enterprises with multiple sites
   that are already interconnected by VPNs (e.g., MPLS L2VPN/L3VPN).

   Current operational problems are examined to determine whether there
   is a need to improve existing protocols or whether a new protocol is
   necessary to solve them.

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), its areas, and its working groups.  Note that
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   Drafts.

   Internet-Drafts are draft documents valid for a maximum of six
   months and may be updated, replaced, or obsoleted by other documents

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   at any time.  It is inappropriate to use Internet-Drafts as
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   The list of current Internet-Drafts can be accessed at
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   This Internet-Draft will expire on August 6, 2019.

Copyright Notice

   Copyright (c) 2019 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
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Table of Contents

   1. Introduction...................................................3
   2. Definition of terms............................................4
   3. Current Practices in Interconnecting Enterprise Sites with Cloud
   DCs...............................................................5
      3.1. Interconnect to Cloud DCs.................................5
      3.2. Interconnect to Hybrid Cloud DCs..........................7
      3.3. Connecting workloads among hybrid Cloud DCs...............7
   4. Desired Properties for Networks that interconnect Hybrid Clouds8
   5. Problems with MPLS-based VPNs extending to Hybrid Cloud DCs....9
   6. Problem with using IPsec tunnels to Cloud DCs.................10
      6.1. Complexity of multi-point any-to-any interconnection.....10
      6.2. Poor performance over long distance......................11
      6.3. Scaling Issues with IPsec Tunnels........................11
   7. Problems of Using SD-WAN to connect to Cloud DCs..............12
      7.1. SD-WAN among branch offices vs. interconnect to Cloud DCs12

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   8. End-to-End Security Concerns for Data Flows...................15
   9. Requirements for Dynamic Cloud Data Center VPNs...............15
   10. Security Considerations......................................16
   Solution drafts resulting from this work will address security
   concerns inherent to the solution(s), including both protocol
   aspects and the importance (for example) of securing workloads in
   cloud DCs and the use of secure interconnection mechanisms.......16
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