As infrastructures expand across different geographic locations and distances grow larger, moving from a single-site setup to a multi-site architecture becomes a natural step.

In an ideal world, each site in a multi-site deployment should operate independently. In practice, though, applications often have specific requirements that call for stretched L2 networks between sites. Since this is driven by the applications themselves, my advice is to design self-sufficient and independent silos that can continue running even if another site goes down.

When the real need is to connect applications across multiple sites in a native and consistent way, the tool of choice is Cisco Nexus Dashboard Orchestrator (NDO).

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