Scale AI workloads

Route diversity means running two or more circuits between the same sites on physically separate paths, so no single fiber cut or equipment failure can take down both. Lumen defines diverse circuits as two or more that are mostly or entirely non-overlapping, and they must be custom routed so they stay that way as the network changes. Diversity is different from protection: diversity separates the paths, while protected service adds automatic failover between them.

No. Buying circuits from two providers does not guarantee two physical paths. Carriers lease capacity from each other, so two circuits sold as separate can ride the same conduit and fail together. Route diversity means the physical paths themselves do not overlap. Lumen builds, owns and operates the largest ultra-low-loss intercity fiber network in North America, with dual gateways per market, so diversity can be designed on one network and verified.

A protected wavelength pairs two diversely routed waves into a working path and a protect path. Lumen manages the switch, typically in under 50 milliseconds after fault detection, and the service carries a 99.99% availability SLA. Diverse unprotected wavelengths give you multiple separate paths that you manage yourself, choosing how traffic moves between them. Most customers run multiple diverse waves; some choose protected service for hands-off failover.

Organizations whose workloads cannot pause: AI training and inference across distributed GPU clusters, data center interconnect, real-time data replication for disaster recovery, financial transactions, healthcare systems and government operations. Buyers are typically network architects, infrastructure leaders and CIOs in regulated industries, data center operators and AI companies. It matters most when a compliance mandate or an SLA requires documented physical route separation.

Diversity has to be designed and then maintained, because network changes can erode it. Lumen customizes routes circuits so they stay non-overlapping, and can identify where a path would overlap with an existing route, including one from another carrier, and reroute it. Topology Viewer lets you map and plan wavelength paths, and LASER supports fiber path verification and self-serve switching between working and protect paths.

Share your endpoints, required bandwidth and any routing constraints, such as a region to avoid or a latency target to meet. Lumen engineers will design the paths, confirm where diversity is available and show how the routes are separated. You can order diverse unprotected wavelengths and manage protection