There are actually many options in actual practice today when it comes to the need for connecting geographically dispersed Data Centers. Obviously, the geographic dispersion is highly favorable for data availability, and the interconnection technology that is chosen should meet the business needs of the organization as well as the generic technology requirements.
This article examines a Cisco solution available in the Nexus line known as Overlay Transport Virtualization or (OTV). The purpose of this document is to provide an overview of the technology. Much more detail is provided in the CCIE Data Center Written Bootcamp here at IPexpert.
Many Data Center designers applaud Cisco’s OTV as it is a very clean design. In this solution, Data Center traffic is bridged directly over an IP core with no required intervening technology such as Multiprotocol Label Switching (MPLS) or pseudowire.