Introduction to Networking for NonStop S-Series Servers

Communications Product Concepts and
Components
Introduction to Networking for HP NonStop S-Series Servers—520670-005
2-11
Example Product Structures
operational attributes; the operator, or an application that performs operator functions,
uses the subdevice name in specifying the attributes. The subdevice name is an
extension of the line name; subdevice names have the same form regardless of the
subsystem, but the interpretation of the name, except for a few reserved names, is
subsystem-specific.
Example Product Structures
The examples in this subsection illustrate and discuss some examples of layered
product structures. Local Area Networks (LANs) and Wide Area Networks (WANs)
shows how LAN and WAN support is integrated for several networking products.
Systems Network Architecture (SNA) Interfaces on page 2-16 shows relationships
among some of the HP SNA interface products. Custom Device Support on page 2-18
shows how products can be combined to provide custom device support.
Local Area Networks (LANs) and Wide Area Networks (WANs)
Two important HP communications interfaces for LANs and WANs are the ServerNet
LAN systems access (SLSA) subsystem and the WAN subsystem. These products
provide LAN and WAN connections for many other communications interface products.
ServerNet LAN Systems Access (SLSA) Subsystem
The SLSA subsystem provides an architecture that supports parallel LAN input/output
(I/O). This architecture allows NonStop S-series servers to communicate across a
ServerNet system area network (ServerNet SAN) and access devices through various
LAN protocols.
The SLSA subsystem uses the shared memory segment provided by the (QIO
subsystem to move the ownership of data between processes. SLSA also uses
QIO-based driver/interrupt handlers (DIHs) to communicate with the appropriate
adapter type over the ServerNet SAN. The driver controls the ServerNet adapters and
uses a set of system library routines accessible by each process that needs to use the
SLSA subsystem. Supported adapters include the following:
•
ATM 3 ServerNet adapter (ATM3SA)
•
Ethernet 4 ServerNet adapter (E4SA)
•
Fast Ethernet ServerNet adapter (FESA)
•
Gigabit Ethernet ServerNet adapter (GESA)
•
Gigabit Ethernet 4-port ServerNet adapter (G4SA)
•
Multifunction I/O board (MFIOB) in the processor multifunction (PMF)
customer-replaceable unit (CRU) and I/O multifunction CRU
•
Token-Ring ServerNet adapter (TRSA)
•
Common Communication ServerNet Adapter (CCSA)
Note. All of the HP communications interface products are described in Part II of this manual.
Note. The Ethernet ports on the MFIOBs can be used only for the system console.