In a distributed cloud topology, VNFs are stitched across the different cloud islands to deliver services. Each site can also have multiple instances of the NFV environment for redundancy and scale.
Each site is a standalone island with its own instance of the Management, Resource, and Edge Pods. Multi-site designs are typically used for load distribution and for higher availability in case of catastrophic site failures.
The design assumes an active-standby configuration for geographic redundancy. Two sites areselected as the primary-secondary pair for failure protection. The remaining remote sites have local instances of the management components for seamless cross-site association capabilities . The geographic redundancy design can be implemented with proximal sites or with larger physical distances, as network latency between sites should be considered.
