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

Communications Subsystems: Monitoring and
Recovery
HP NonStop S-Series Operations Guide—522459-008
6-2
Local Area Networks (LANs) and Wide Area
Networks (WANs)
networks (LANs) or wide area networks (WANs), respectively. Similarly, multiple
higher-level components can use the services of a single lower-level component.
Local Area Networks (LANs) and Wide Area Networks (WANs)
Two important communications interfaces for LANs and WANs on NonStop S-series
servers are the SLSA subsystem and the WAN subsystem.
The SLSA subsystem supports parallel LAN I/O operations, allowing NonStop S-series
servers to communicate across the ServerNet fabrics and access Ethernet devices
through various LAN protocols. SLSA also communicates with the appropriate adapter
type over the ServerNet fabrics. Supported adapters include:
•
ATM 3 ServerNet adapter (ATM3SA)
•
Ethernet 4 ServerNet adapter (E4SA)
•
Fast Ethernet ServerNet adapter (FESA)
•
Gigabit Ethernet ServerNet adapter (GESA)
•
Gigabit Ethernet 4-port adapter (G4SA)
•
Multifunction I/O board (MFIOB) in the processor multifunction (PMF) customer-
replaceable unit (CRU) and I/O multifunction (IOMF) CRU
•
Token-Ring ServerNet adapter (TRSA)
In addition to the adapters, the SLSA subsystem also supports these objects:
•
Processes
•
Monitors
•
ServerNet addressable controllers (SACs)
•
Logical interfaces (LIFs)
•
Filters
•
Physical interfaces (PIFs)
Processes that use the SLSA subsystem to send and receive data on a LAN attached
to a NonStop S-series server are called LAN service providers. Three service
providers—the NonStop TCP/IP subsystem and Parallel Library TCP/IP subsystem,
the Port Access Method (PAM), and NonStop IPX/SPX—are currently supported. They
provide access for these subsystems:
LAN Service Provider Subsystems Supported
NonStop TCP/IP subsystem,
Parallel Library 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.
NonStop IPX/SPX Novell NetWare LAN