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Communications Subsystems: Monitoring and
Recovery
HP Integrity NonStop NS-Series Operations Guide—529869-005
6-3
Local Area Networks (LANs) and Wide Area
Networks (WANs)
•
Physical interfaces (PIFs)
Processes that use the SLSA subsystem to send and receive data on a LAN attached
to an Integrity NonStop server are called LAN service providers. Two service
providers—the NonStop TCP/IP and NonStop TCP/IPv6 subsystems and the Port
Access Method (PAM)—are currently supported. They provide access for these
subsystems:
Processes, user applications, and subsystems that use the SLSA subsystem and
related LAN providers to connect to an FCSA or G4SA attached to an Integrity
NonStop NS-series server are called LAN clients. For example, the WAN subsystem is
a client of the SLSA subsystem because the SLSA subsystem provides the WAN
subsystem access to the ServerNet wide area network (SWAN) concentrator through
the LAN.
The WAN subsystem is used to control access to the SWAN concentrator. Depending
on your configuration, it can be used to configure and manage both WAN and LAN
connectivity for these communication subsystem objects:
You can define these communications subsystem objects as WAN subsystem devices.
LAN Service Provider Subsystems Supported
NonStop TCP/IP subsystem,
NonStop TCP/IPv6 subsystem
The Expand subsystem, which provides Expand-over-
IP connections.
Port Access Method (PAM) Ethernet and token-ring LANs. The OSI/AS, OSI/TS,
SNAX/XF, and SNAX/APN subsystems communicate
with SLSA through the PAM subsystem.
Object Connectivity By
AM3270 Line-handler processes
Asynchronous Terminal Process
6100 (ATP6100)
Line-handler processes
Communications Process
subsystem (CP6100)
Line-handler processes
EnvoyACP/XF Line-handler processes
Envoy subsystem Line-handler processes
Expand Subsystem network control process and line-handler
processes
ServerNet cluster (Expand-over-
ServerNet)
Line-handler processes
SNAX/APN Subsystem service manager process and line-handler
processes
SNAX/XF Subsystem service manager process and line-handler
processes
TR3271 Line-handler processes
X25AM Line-handler processes