Some sites might benefit from having multiple gateways. Using multiple gateways can improve network performance and can provide backup access to the Internet. Figure 1-3 shows a network with multiple IPeXchange gateways. To determine whether the gateway is overloaded, monitor its CPU usage. Heavy CPU usage can indicate a need for additional IPeXchange gateways.
IPeXchange gateways perform automatic load balancing.
As the IPeXchange gateway's load increases, it sends SAP messages less often, thus attracting fewer connection requests than a lightly loaded gateway. Improve Availability Service can be interrupted by failure at the IPeXchange gateway or at the Internet connection. To provide uninterrupted service, consider adding redundancy. A fault-tolerant environment includes multiple IPeXchange gateways or multiple Internet connections, or both. If an IPeXchange gateway fails, applications on IPeXchange clients connected to that gateway also fail.