Dynamic Networks to Hybrid Cloud DCs Problem Statement
draft-ietf-rtgwg-net2cloud-problem-statement-04

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Last updated 2019-09-23
Replaces draft-dm-net2cloud-problem-statement
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Network Working Group                                         L. Dunbar
Internet Draft                                                Futurewei
Intended status: Informational                               Andy Malis
Expires: Dec 2019                                           Independent
                                                           C. Jacquenet
                                                                 Orange
                                                                 M. Toy
                                                                Verizon
                                                     September 23, 2019

           Dynamic Networks to Hybrid Cloud DCs Problem Statement
              draft-ietf-rtgwg-net2cloud-problem-statement-04

Abstract

   This document describes the problems that enterprises face today
   when interconnecting their branch offices with 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 different
   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.

xxx, et al.             Expires March 23, 2020                 [Page 1]
Internet-Draft        Net2Cloud Problem Statement        September 2019

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Table of Contents

   1. Introduction...................................................3
      1.1. On the evolution of Cloud DC connectivity.................3
      1.2. The role of SD-WAN techniques in Cloud DC connectivity....4
   2. Definition of terms............................................4
   3. Interconnecting Enterprise Sites with Cloud DCs................5
      3.1. Multiple connections to workloads in a Cloud DC...........5
      3.2. Interconnect Private and Public Cloud DCs.................7
      3.3. Desired Properties for Networks that interconnect Hybrid
      Clouds.........................................................8
   4. Multiple Clouds Interconnection................................9
      4.1. Multi-Cloud Interconnection...............................9
      4.2. Desired Properties for Multi-Cloud Interconnection.......11

Dunbar, et al.           Expires Dec 23, 2019                  [Page 2]
Internet-Draft        Net2Cloud Problem Statement        September 2019

   5. Problems with MPLS-based VPNs extending to Hybrid Cloud DCs...11
   6. Problem with using IPsec tunnels to Cloud DCs.................13
      6.1. Complexity of multi-point any-to-any interconnection.....13
      6.2. Poor performance over long distance......................14
      6.3. Scaling Issues with IPsec Tunnels........................14
   7. Problems of Using SD-WAN to connect to Cloud DCs..............15
      7.1. SD-WAN among branch offices vs. interconnect to Cloud DCs15
   8. End-to-End Security Concerns for Data Flows...................18
   9. Requirements for Dynamic Cloud Data Center VPNs...............18
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