Introduction to SNAplus2
SNAplus2 Components
SNAplus2 TN server supports all TN3270 client emulation programs that correctly implement the protocols defined in RFCs 1123, 1576, 1646, and 1647.
When a TN3270 program communicates with TN server, SNAplus2 identifies the program by the TCP/IP address of the computer where the TN3270 program is running. SNAplus2 cannot distinguish between two different TN3270 programs being used by different users on the same computer. In the SNAplus2 manuals, the term TN server user refers to the computer where a TN3270 program is running, not to an individual user of that program.
Each TN server user is normally configured to access a single 3270 LU, and so is restricted to one host session at a time. However, you can also configure a TN server user to access a pool of 3270 LUs, instead of having a single dedicated 3270 LU for each user. This enables the user to access as many sessions as there are available LUs in the pool.
User Applications
SNAplus2 supports the following user applications:
•3270 emulation programs (see “3270 Emulation”).
•5250 emulation programs (see “5250 Emulation”).
•RJE workstation daemon (see “RJE Workstation Daemon”).
3270 EmulationYou can use 3270 emulation software to log on to and use SNA host systems from your computer, control display and printer emulation sessions, and to transfer files between the local and host computers. 3270 emulation uses the node's LU type
To use 3270 emulation, you need to define the 3270 users on your system, identified by their login IDs, and the 3270 features available to each user or group of users. 3270 users and sessions are defined as domain resources, which simplifies the configuration required to support emulation across the domain.
The SNAplus2 3270 emulation program provides session control and file transfer capabilities. In addition, you can customize some 3270 emulation features, such as
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