Some sites might benefit from having multiple Cisco routers acting as Internet 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 sharing.
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. If you have additional gateways, IPeXchange client software automatically connects to the gateways that are running when desktop users restart their applications.