NonStop S-Series Operations Guide (G06.27+)

Communications Subsystems: Monitoring and
Recovery
HP NonStop S-Series Operations Guide—522459-008
6-3
Monitoring Communications Subsystems and Their
Objects
Processes, user applications, and subsystems that use the SLSA subsystem and
related LAN providers to connect to an Ethernet, a Fast Ethernet, a Gigabit Ethernet, a
Gigabit 4-port Ethernet or a token-ring LAN attached to a NonStop S-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.
Monitoring Communications Subsystems and
Their Objects
Monitoring and recovery operations for communications subsystems can be complex.
An error in any of the components—service providers, clients, objects, adapters,
processes, and so on—can generate multiple error messages from many
interdependent subsystems and processes. Analyzing and solving an error that
originates in an object controlled by a LAN or a WAN often requires that you
methodically gather status information about the affected services and then eliminate
objects that are working normally.
Object Connectivity By
AM3270 Line-handler processes
Asynchronous Terminal
Process 6100 (ATP6100)
Line-handler processes
ServerNet/FX Line-handler processes
Communications Process
subsystem (CP6100)
Line-handler processes
SNAX/APN Subsystem service manager process and line-
handler processes
Envoy subsystem Line-handler processes
SNAX/XF Subsystem service manager process and line-
handler processes
EnvoyACP/XF Line-handler processes
TR3271 Line-handler processes
Expand Subsystem network control process and line-
handler processes
X25AM Line-handler processes
ServerNet cluster (Expand-
over-ServerNet)
Line-handler processes