To achieve 99.99% availability with Dedicated Interconnect, which configuration is necessary?

To achieve 99.99% availability with Dedicated Interconnect, having four interconnects across two different metro areas is essential. This configuration is designed to ensure high redundancy and fault tolerance, which are critical for maintaining such a high level of availability.

By distributing the interconnects across two different metro areas, the setup mitigates the risk of outages caused by localized events like natural disasters, network failures, or maintenance in a specific region. If one metro area faces a problem, the other metro can continue to provide connectivity, thus ensuring ongoing availability.

Utilizing multiple interconnects also allows for traffic load balancing and can help in failover scenarios. In the event that one of the interconnects experiences issues, the remaining connections can handle the traffic, maintaining service continuity.

While configurations involving two interconnects in one metro area or three interconnects in the same area provide some level of redundancy, they do not offer the geographical diversity needed to meet the high availability requirement. A single interconnect with a high-speed link does not provide the redundancy needed for such availability either, as it represents a single point of failure.