HP-UX SNAplus2 R7 NOF Programmer's Guide

Introduction to the NOF API
SNAplus2 Resources
• LUs
• Type 0–3 for:
• 3270
• RJE
• LUA communications
• Type 6.2 for:
• APPC
• CPI-C communications
• 5250 emulation
• Modes and classes of service
• Directory information
Domain resources
Additional resources not defined as part of the node, which are used to support particular user programs.
These resources include:
• 3270 user information
• RJE workstations
• CPI-C side information
• Information about access to the UNIX Command Facility and Service Point Command Facility
For more information about these resources, refer to the HP-UX SNAplus2 Administration Guide.
1.3.1 Dependent LU Requester (DLUR)
This section does not apply to LEN nodes.
As well as providing direct access to a host computer, SNAplus2 can also provide DLUR facilities. This feature
enables sessions for dependent LUs to span multiple nodes in an APPN network, instead of requiring a direct
connection to the host.
DLUR on the SNAplus2 node works in conjunction with Dependent LU Server (DLUS) at the host to route sessions
from dependent LUs on the SNAplus2 node across the network to the DLUS host. The route to the host can span
multiple nodes, and can take advantage of APPN’s network management, dynamic resource location, and route
calculation facilities.
If the local node is a network node, dependent LUs on downstream computers connected to the SNAplus2 node can
also use DLUR on the SNAplus2 node to access the host across the network, in the same way as for LUs internal
to the node.
1.3.2 PU Concentration
As well as providing direct access to a host computer, SNAplus2 can also provide PU concentration facilities. This
feature enables other computers to use SNAplus2 resources to access a host computer instead of requiring a separate
connection to the host from each computer.
Figure 1–2, PU Concentration Facilities Provided by SNAplus2, illustrates the PU concentration feature.
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