ATM Configuration and Management Manual

Glossary
ATM Configuration and Management Manual—522307-003
Glossary-19
ServerNet LAN systems access (SLSA) subsystem
ServerNet LAN systems access (SLSA) subsystem. A subsystem of the NonStop Kernel
operating system for configuration and management of ServerNet local area network
(LAN) objects in G-series release version updates (RVUs).
ServerNet router. An application-specific integrated circuit (ASIC) responsible for routing
ServerNet packets along ServerNet links in the ServerNet fabrics, using routing
information that is present within the packets. A ServerNet router acts as a fully duplex
crossbar switch, able to switch any of its input ports to any of its output ports. A
ServerNet router in a NonStop S-series server has either six router ports (see
ServerNet router 1) or twelve router ports (see ServerNet router 2).
ServerNet router 1. A model of ServerNet router that, in a NonStop S-series server, has a
total of six input and six output ports. See also ServerNet router 2.
ServerNet router 2. A model of ServerNet router that, in a NonStop S-series server, has a
total of twelve input and twelve output ports. See also ServerNet router 1.
ServerNet SAN. See ServerNet system area network (ServerNet SAN).
ServerNet system area network (ServerNet SAN). A wormhole-routed, full-duplex,
packet-switched, point-to-point network designed with special attention to reducing
latency and ensuring reliability. The ServerNet SAN provides the communication path
used for interprocessor messages and for communication between processors and I/O
devices.
ServerNet wide area network (SWAN) concentrator. (1) An HP data communications
peripheral that provides connectivity to a NonStop S-series server. The SWAN
concentrator supports both synchronous and asynchronous data over RS-232, RS-
449, X.21, and V.35 electrical and physical interfaces. (2) A collective term for both
SWAN concentrators and SWAN 2 concentrators when a distinction between the two is
not required.
service access point (SAP). A SAP is used for the following: (1) When the application
initiates an outgoing call to a remote ATM device, a destination_SAP specifies the ATM
address of the remote device, plus further addressing that identifies the target software
entity with the remote device. (2) When the application prepares to respond to
incoming calls from remote ATM devices, a local_SAP specifies the ATM address of
the device housing the application, plus further addressing that identifies the
application within the local device.
service processor (SP). A physical component of the processor multifunction (PMF)
customer-replaceable unit (CRU) or I/O multifunction (IOMF) CRU that controls
environmental and maintenance functions (including system load functions) in the
enclosure. SPs operate in pairs to provide fault tolerance. The two SPs in group 01 are
designated the master service processors (MSPs). Other pairs of SPs within a system
are called expansion service processors (ESPs). See also expansion service
processor (ESP) and master service processor (MSP).