Introduction to SNAplus2

SNAplus2 Components

configuration. You can configure a node from any other computer in the domain, as long as the SNA software is running on the node where the configuration is performed (whether or not the node being configured is started).

Information about the configuration of domain resources for the complete SNAplus2 LAN is held in a domain configuration file. If you have more than one server on the LAN, SNAplus2 ensures that this domain configuration information is consistent across all servers.

Benefits of Client/Server Operation

Client/server configuration provides the following benefits:

•Concentrating SNA resources on servers reduces the load on clients, improving client performance and minimizing the storage needed to provide SNA services to clients.

•Sharing a single data link among multiple users on different machines eliminates the need for each machine to have a physical SNA network connection.

•Having multiple servers provides redundant connectivity (for example, by having multiple servers providing access to the same host). Having multiple paths to an SNA resource enables load balancing across the different servers and provides immediate backup in the event that a particular server or link fails.

•Using LU pools across multiple servers makes it easy to configure and add servers and users.

•Having fewer links and PUs for host connectivity reduces the size of the host VTAM definition.

•Using SNAplus2 administration utilities makes it easy to configure and manage both node resources (for any specific computer in the domain) and shared resources (across the domain). The client/server support provided by SNAplus2 administration tools enables transparent administration of all domain resources from any computer in the domain.

Master Server and Backup Servers

If you are using SNAplus2 with all programs on one computer, or on a LAN that contains only one server, you do not need to read this section.

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Chapter 2