Gartner Research

Connecting Multiple Data Centers and Clouds via Data Center Interconnect

Published: 06 February 2014

ID: G00258113

Analyst(s): Simon Richard


Cloud services, workload mobility, distributed active-active applications, network virtualization, SDN and protocols that extend VLANs across IPs are spurring organizations to revisit their DCI architectures. This DCI assessment provides Gartner recommendations for enterprise DCIs.

Table Of Contents

Summary of Findings


  • Use Cases
  • Approaches to DCI
    • Dark Fiber or OTS
    • Carrier Ethernet Services
    • VPLS- or EVPN-based
    • Shared Layer 3 Service (MPLS, Internet)
    • MAC Over IP
    • Network Virtualization
  • DCI Approaches: Pros and Cons


  • DCI in the Limelight
  • Technical Factors and Constraints That Will Influence the DCI Solution
    • IT Service Availability Model
    • Number of Data Centers
    • Distance Between Data Centers
    • Transport Attributes
    • Data Replication Approach
    • WAN Path Isolation
    • Hybrid Cloud Connectivity
    • Need for Layer 2 Extension
  • DCI Environment Components
    • User to Service
    • DCI Access
    • DCI Link
    • VLAN Stretching
  • Comparing DCI Approaches
    • Optical Transport Services
    • Ethernet Services
    • VPLS or EVPN
    • Shared Layer 3 Service (Internet and MPLS)
    • MAC Over IP
    • Network Virtualization


Gartner Recommended Reading

©2021 Gartner, Inc. and/or its affiliates. All rights reserved. Gartner is a registered trademark of Gartner, Inc. and its affiliates. This publication may not be reproduced or distributed in any form without Gartner’s prior written permission. It consists of the opinions of Gartner’s research organization, which should not be construed as statements of fact. While the information contained in this publication has been obtained from sources believed to be reliable, Gartner disclaims all warranties as to the accuracy, completeness or adequacy of such information. Although Gartner research may address legal and financial issues, Gartner does not provide legal or investment advice and its research should not be construed or used as such. Your access and use of this publication are governed by Gartner’s Usage Policy. Gartner prides itself on its reputation for independence and objectivity. Its research is produced independently by its research organization without input or influence from any third party. For further information, see Guiding Principles on Independence and Objectivity.

Already have a Gartner Account?

Become a client

Learn how to access this content as a Gartner client.