HP-UX SNAplus2 General Information (October 1998)

30 Chapter 2
Introducing SNAplus2
SNAplus2 Resources
In addition, you might need to specify requirements for
the communications path between the LUs, such as
enforcing a certain level of network security,
minimizing transmission time, or avoiding the use of
expensive communications links. These requirements
can be defined using a class of service (COS), which
specifies minimum and maximum acceptable values for
characteristics such as transmission time,
transmission cost, and network security, and
weightings associated with different ranges of these
values. The COS definition enables the node to
calculate the best route across the network when two
or more routes to the same remote LU are available.
If the SNAplus2 node is a LEN node or end node, you
do not need to associate a COS with the mode; the COS
name is determined dynamically.
SNA defines a number of standard modes and
associated COSs that cover the requirements of most
systems; in general, you do not need to define
additional modes and COSs.
SNAplus2 Applications
SNAplus2 includes end user applications, as well as application
programming interfaces that you can use to write your own applications.
SNAplus2 supports the following end user applications:
• 3270 emulation program
• RJE workstation daemon
• APPC transaction programs
• CPI-C applications
• LUA applications
• UNIX command facility
• Service point command facility
These are all user-space programs. SNAplus2 supports multiple copies of
the 3270 emulation program and multiple APPC TPs, CPI-C
applications, and LUA applications, running concurrently.