Diameter Enabler can be configured to run in horizontal and vertical clusters.
To achieve scalability and reliability, Diameter Enabler utilizes the clustering ability provided with the WebSphere® Application Server Network Deployment product. When you use databases, they should be configured for failover in order to increase reliability.
Other WebSphere Application Server methods, such as an IP sprayer or edge server, and other resource configurations, such as database or network topologies, can also be employed.
Scaling may be vertical only, horizontal only, or a combination. For both horizontal and vertical clusters, each server must have a unique OriginHostName and a unique HostIpAddress and port number pair.
Horizontal clusters are servers on separate physical servers. Each server must have a unique IP address. Each server may be configured to listen on the same port number. 3868 is the recommended port number because the RFC references that port for Diameter connections.
Vertical clusters are application servers on the same physical server. Each application server may have the same IP address. The IP address and TCP port combination must be unique for every cluster member. If the IP address is the same for two or more vertical cluster members, the port must be different.
You can install the components into an existing cell environment where cell security is already configured. Alternatively, you can install the components in a local environment and then add the node to a cell later on.