IPX/SPX Programming Manual

Introduction to NonStop IPX/SPX
HP NonStop IPX/SPX Programming Manual—528022-001
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Interfaces
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NetWare Core Protocol (NCP) allows client workstations to access NetWare
servers and services and corresponds to the OSI model Transport and Session
Layers. NCP operates in conjunction with the underlying IPX network-level
protocol. NCP is not available for NonStop IPX/SPX application development.
•
Service Advertising Protocol (SAP) allows service nodes, such as file servers, print
servers, and database servers, to register their services and addresses in SAP
tables maintained by each server.
Figure 1-1 shows the protocols in relation to each other and to the OSI service layers.
The unshaded SPXII, IPX, and SAP protocols shown in Figure 1-1 are accessible for
customer application development. For detailed descriptions of the NonStop IPX/SPX
protocols, see Section 3, Programming Using the Socket Interface.
Interfaces
The NonStop IPX/SPX subsystem provides interfaces to NetWare protocols and to
subsystem management functions. Most of the NonStop IPX/SPX interfaces are
organized into C-coded libraries. A TAL version is available through a set of header
files. NonStop IPX/SPX provides the following interfaces:
•
Version 2 socket library allows you to write application services either to the IPX or
SPXII protocol layer.
Figure 1-1. NetWare Protocols Supported by NonStop IPX/SPX
VST0101.vsd
Presentation
Network
Physical
OSI Service Layers
Application
Transport
Session
IPX
SPXII
SAP
NCP
RIP
Ethernet II, 802.3, 802.2, SNAP