HP-UX SNAplus2 R7 General Information

Introducing SNAplus2
SNAplus2 Resources
2 Introducing SNAplus2
SNAplus2 is a software product that enables HP-UX computers to communicate with remote computers (IBM
mainframes, PCs, or other HP-UX computers) within an IBM SNA network. It provides SNA node type 2.0 and
2.1 support for communicating with host and peer computers; it also implements an APPN node, providing network
node, end node, branch network node, or LEN node function, depending on its configuration. (See Section 2.1,
SNAplus2 Components.)
The SNAplus2 system defines resources that enable it to participate in the SNA network and support specific types
of communication. Those resources are described in Section 2.2.1, Node Resources.
With SNAplus2, you can access data and programs that reside on other computer systems, thereby increasing your
computing power. You can establish connections with several computers concurrently using different methods of
communication: 3270 emulation, RJE, APPC, CPI-C, and LUA. In addition, the SNAplus2 API libraries provide
support for SNA applications (LU type 0, 1, 2, 3, or 6.2), both on SNAplus2 servers and on HP-UX and Windows
clients. SNAplus2 also includes user applications. APPC Application Suite provides SNA equivalents of common
TCP/IP applications such as
ftp and
ping. For more information about application support, see Section 2.2.2,
SNAplus2 Applications.
Passthrough features enable computers in a local area network to access SNA resources through the local system,
as described in Section 2.2.3, SNAplus2 Passthrough Services.
SNAplus2 also supports client/server configurations as described in Section 2.2.4, Client/Server Support.
For an overview of the advantages offered by SNA networking with SNAplus2, see Section 2.3, Benefits Provided
by SNAplus2.
2.1 SNAplus2 Components
SNAplus2 implements an APPN node to communicate with other nodes on the SNA network. This provides LU
6.2 support for APPC and CPI-C capabilities, as well as LU 0, 1, 2, and 3 support for 3270 RJE, and LUA
communications.
SNAplus2 can operate as any of the APPN node types (network node, end node, branch network node, or LEN
node), depending on its configuration. Certain functions are supported only on network nodes, or only on network
and end nodes, as defined by the APPN architecture. These differences are indicated where necessary in this manual;
where no differences are indicated, the information applies to all node types.
2.2 SNAplus2 Resources
Node resources define the communications capabilities of the APPN node, including connectivity resources (ports
and link stations), LUs (type 0–3 for 3270RJE, and LUA communications, and type 6.2 for APPC and CPI-C
communications), modes, and directory information.
Domain resources are available to all of the SNAplus2 systems in the local network; such resources are used to
support particular user programs. Domain resources include RJE workstation definitions, 3270 user information,
CPI-C side information, and information about access to the UNIX command facility and the service point command
facility.
18