NonStop Operations Guide for H-Series and J-Series RVUs

devices through various LAN protocols. SLSA also communicates with the appropriate adapter
type over the ServerNet fabrics. Adapters supported on NonStop systems include:
• Gigabit Ethernet 4-port adapter (G4SA)
• Fibre Channel ServerNet adapter (FCSA) (for the Storage subsystem)
The Storage CLIMs and IP CLIMs can take the place of G4SA, FCSA, and IOAM on NonStop
BladeSystems.
A Telco CLIM supports the Message Transfer Part Level 3 User Adaptation layer (M3UA) protocol.
An IB CLIM contains three Ethernet interfaces for connecting to customer data LAN(s), and one
additional interface dedicated to the maintenance LAN.
The IB CLIMs are used as part of a Low Latency Solution. The Low Latency Solution architecture
provides a high speed and low latency messaging system for stock exchange trading from the
incoming trade server to the NonStop operating system. The solution utilizes the third-party
Informatica software for messaging and order sequencing which must be installed separately.
The Low Latency Solution also requires a customer-supplied IB switch and Subnet Manager software
either installed on the IB switch or running on another server.
NOTE: All CLIMs and other I/O devices connect to a maintenance LAN, which is a dedicated
service LAN. For more information about maintenance LANs, ask your service provider to refer to
the NonStop Dedicated Service LAN Installation and Configuration Guide.
I/O adapter module (IOAM) enclosures enable I/O operations to take place between NonStop
systems and some Fibre Channel storage devices. See the Modular I/O Installation and
Configuration Guide for more information.
The SLSA subsystem 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 an NonStop
system 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:
Subsystems SupportedLAN Service Provider
The Expand subsystem, which provides Expand-over-IP
connections.
NonStop TCP/IP subsystem, NonStop TCP/IPv6 subsystem
Ethernet and token-ring LANs. The OSI/AS, OSI/TS,
SNAX/XF, and SNAX/APN subsystems communicate with
SLSA through the PAM subsystem.
Port Access Method (PAM)
Processes, user applications, and subsystems that use the SLSA subsystem and related LAN providers
to connect to an FCSA or G4SA attached to an NonStop system 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. SWAN concentrators can also be connected to CLIMs, but CLIMs and CIP do
not use SLSA.
86 Communications Subsystems: Monitoring and Recovery