Expand Configuration and Management Manual (H06.03+)

Glossary
Expand Configuration and Management Manual—529522-002
Glossary-20
wide area network (WAN) subsystem
wide area network (WAN) subsystem. The subsystem that is used to configure and
manage Expand line-handler processes and the network control process ($NCP). The
WAN subsystem also provides access to the ServerNet wide area network (SWAN)
concentrator. See also ServerNet wide area network (SWAN) concentrator.
wide area network (WAN) subsystem manager process. A process named $ZZWAN that
starts and manages the WAN subsystem objects and the WAN product processes and
device objects. Subsystem Control Facility (SCF) commands are directed to the WAN
manager process for configuring and managing the WAN subsystem and the
ServerNet wide a area network (SWAN) concentrator.
X.25 Access Method. A network access method (NAM) that can be used with the Expand
subsystem to provide Expand-over-X.25 connections. The Expand-over-X.25 line-
handler process uses the NETNAM protocol to communicate with the X25AM line-
handler process. See also network access method (NAM) and NETNAM protocol.
X25AM. See X.25 Access Method.
X and Y fabrics. X and Y fabrics are a collection of connected routers and ServerNet links
that, together, provide an interconnection for NonStop NS-series servers. Each
processor connects to both fabrics. The X fabric and the Y fabric are not connected to
each other; therefore, a ServerNet packet cannot cross from one fabric to the other
and a failure in one fabric does not affect the other fabric.
$NCP. The process name of the network control process.
$ZEXP. The process name of the Expand manager process.
$ZNET. The process name of the default Subsystem Control Point (SCP).
$ZNUP. The process name of the network utility process.
$ZPM. The process name of the persistence manager process.
$ZZKRN. The process name of the Kernel subsystem manager process.
$ZZLAN. The process name of the ServerNet LAN systems access (SLSA) subsystem
manager process.
$ZZSCL. The process name of the ServerNet monitor process.
$ZZWAN. The process name of the wide area network (WAN) subsystem manager process.