HP NonStop G-Series User Manual
Page 292
ServerNet
addressable
controller (SAC)
A controller that is uniquely addressable within one or more ServerNet address domains (SADs)
through the node ID and address fields in a request packet. A SAC is typically implemented on
some portion of a
processor multifunction (PMF) customer-replaceable unit (CRU)
, an
I/O
multifunction (IOMF) CRU
, or a
ServerNet adapter
.
ServerNet cluster
A network of servers connected using the ServerNet protocol and sharing a common transport
for interprocessor communication across and within a cluster. It offers fast end-to-end
communication without intermediate protocol stacks, achieving comparable speeds for internal
and external ServerNet communication.
See also
cluster
.
ServerNet
expansion board
(SEB)
A connector board that plugs into the
backplane
to allow one or more ServerNet cables to exit
the rear of the enclosure. The ServerNet expansion boards (SEBs) and cables allow processors
in one
group
to communicate with processors in another group. Each SEB provides either the
ServerNet X
fabric
or the ServerNet Y fabric for a group. SEBs are
customer-replaceable units
(CRUs)
.
ServerNet II
switch
A 12-port network switch that provides the physical junction point to enable an NonStop S-series
server to connect to a ServerNet cluster. The ServerNet II switch is a component of the
HP
NonStop Cluster Switch (model 6770)
.
ServerNet router
An application-specific integrated circuit (ASIC) responsible for providing interconnection of
ServerNet links in a
ServerNet system area network (ServerNet SAN)
. A ServerNet router is
never an end device.
ServerNet Switch
Board
The component in a processor switch that provides the switching logic. The board has a front
panel with a liquid-crystal display (LCD) for operator and maintenance functions.
ServerNet system
area network
(ServerNet SAN)
A low-cost, high-speed network, contained within a system, that connects processors to each
other and to ServerNet addressable controllers (SACs).
See also
local area network (LAN)
and
wide area network (WAN)
.
ServerNet wide
area network
An HP data communications peripheral that provides connectivity to an HP NonStop server.
The SWAN 2 concentrator supports both synchronous and asynchronous data over RS-232,
(SWAN) 2
concentrator
RS-449, X.21, and V.35 electrical and physical interfaces. The SWAN 2 concentrator is the
next-generation SWAN concentrator and has 12 WAN ports.
ServerNet wide
area network
(1) An HP data communications peripheral that provides connectivity to an HP NonStop server.
The SWAN concentrator supports both synchronous and asynchronous data over RS-232,
(SWAN)
concentrator
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.
ServerNet/FX 2
adapter
A ServerNet adapter that logically extends the ServerNet X and Y fabrics to other clusters in a
Fiber Optic Extension (FOX) ring by using fiber-optic lines. Two 6742 ServerNet/FX 2 adapters
are used, one for the X ring and one for the Y ring.
ServerNet/FX
adapter
A ServerNet adapter that logically extends the ServerNet X and Y fabrics to other clusters in a
Fiber Optic Extension (FOX) ring by using fiber-optic lines. Two 6740 ServerNet/FX adapters
are used, one for the X ring and one for the Y ring.
service processor
(SP)
A physical component of the
processor multifunction (PMF) customer-replaceable unit (CRU)
or
multifunction I/O (MFIO) board
that controls the serial maintenance bus (SMB) and provides
environmental and maintenance functions, including
system load
functions. Service processors
operate in pairs in order to provide fault tolerance. One pair of service processors in a system
is designated as the
master service processors (MSPs)
. Other pairs within the same system
are called expansion service processors (ESPs).
See also
master service processor (MSP)
, and
peer service processor (PSP)
.
service connection
A connection between the system console and the OSM software on a NonStop server. A
service connection is initiated from the browser on the system console and can be used to
communicate with the server only when the NonStop operating system is running. The OSM
Service Connection provides a comprehensive service and maintenance picture of the server
or ServerNet cluster and is used to perform most service management tasks.
See also
low-level link
.
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Glossary