Introduction to Overlay Transport Virtualization
Data Center Interconnect (DCI) solutions have been available for quite some time; it is mainly used to enable the benefit of geographically separated data centers. Layer 2 extensions might be required at different layers in the data center to enable the resiliency and clustering mechanisms offered by the different applications at the web, application, and database layers. Different types of technologies provide Layer 2 extension solutions:
Ethernet over Multiprotocol Label Switching (EoMPLS): EoMPLS can be used to provision point-to-point Layer 2 Ethernet connections between two sites using MPLS ...
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