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Introduction to Networking for NonStop S-Series Servers

ManualsBrandsHP ManualsServerHP NonStop G-Series
41424344454647484950
Communications Product Concepts and
Components
Introduction to Networking for HP NonStop S-Series Servers—520670-005
2-19
Communications Hardware Concepts
Communications Hardware Concepts
The ServerNet adapters and the ServerNet wide area network (SWAN) concentrator
are communications devices that control devices or communications lines on behalf of
communications subsystems. Your application has access to a ServerNet adapter or
SWAN concentrator through an IOP as described in Input/Output Processes (IOPs) on
page 2-6.
ServerNet Adapters
A ServerNet adapter provides the interface between the ServerNet SAN and a
particular I/O bus, such as Ethernet or SCSI. A ServerNet adapter contains a
ServerNet bus interface (SBI) and one or more ServerNet addressable controllers
(SACs).
•
The SBI is an application-specific integrated circuit (ASIC) on the ServerNet
adapter that provides the interface between the ServerNet SAN and a different
industry-standard bus within the adapter, such as the Motorola 68030 bus, to which
SACs are attached.
•
SACs provide the controller functions for ServerNet adapters. These controllers
provide the interfaces to buses such as SCSI, which connect to peripheral devices.
Pathway/TS Provides a multithreaded terminal control process (TCP) for
communication with terminals, including fault-tolerance and
transaction processing.
Extended
General Device
Support (GDSX)
Serves as a skeleton for a custom device support application,
implementing standard functions for NonStop Kernel operating
system processes.
You can also use other IOPs, such as X25AM, with GDSX.
EnvoyACP/XF Provides bit-synchronous data-link control functions over leased
or switched lines.
Envoy Provides asynchronous and byte-synchronous data-link control
functions over leased or switched lines.
CP6100 Provides an interface with low-level protocol modules running in
intelligent communications controllers.
6100 ADCCP,
BSC, and other
protocol modules
Provide data-link control functions for various protocols.