A Gateway cluster consists of multiple Gateway nodes that connect to a single database. A Load Balancer allows the cluster to present a unified network interface to client systems and software. The Gateway cluster shares the service policies, identity providers, and configuration settings administered in the Policy Manager. This dramatically increases the scalability, processing power, and reliability of the Gateway implementation.

The Gateway cluster is an intelligent information propagation system that distinguishes between time-sensitive data that must be updated synchronously, data that is node-specific, and data that must be commonly available yet updated asynchronously. For example, policy and configuration setting changes are automatically propagated to each cluster node asynchronously within five seconds of the change in the Policy Manager. In contrast, replay attack data and SLA counters require instantaneous synchronized cluster-wide updates for them to be useful.