High resiliency and service availability are key design considerations when deploying mission-critical microwave networks. It is imperative that network connectivity can still be provided in the case of a multi-failure scenario. The traditional architecture of ring-and-spoke topology can provide strong protection against failure in the aggregating ring sites but leaves the spokes in access sites vulnerable to upstream failure because there is no path diversity protection. This white paper discusses how deploying a multi-ring topology in backhaul networks can provide the protection required and explains why only Layer 3 microwave technology can be used to leverage the full path diversity to restore connectivity in even a multi-failure scenario.