Expand Configuration and Management Manual (H06.03+)

Glossary
Expand Configuration and Management Manual—529522-002
Glossary-17
SH
SH. See split horizon (SH).
single-line path. A path that consists of one line. See also line, path, and route. Contrast
multi-line path.
SLSA subsystem. See ServerNet LAN systems access (SLSA) subsystem.
SNA. See Systems Network Architecture (SNA).
split horizon (SH). An alternative routing algorithm provided by the Expand subsystem. The
main advantage of SH is that alternate paths are immediately known (temporary
discontinuity never occurs). The main disadvantage of SH is that it increases the
occurrence of loop routing. See also modified split horizon (MSH).
stack. A portion of the Expand line-handler process data space. The Expand subsystem
allocates 700 words to the stack.
STARTED. The state of a process, indicating that it is running and able to accept user
requests.
STARTING. An intermediate state in which a process is in transition to the STARTED state.
User requests are not accepted until the process is STARTED.
state. For Distributed Systems Management (DSM), the current condition of a process that
indicates its readiness to do work. States for PROCESS objects include STARTED,
STOPPED, STARTING, and UNKNOWN.
state machine. The part of a process that acts upon occurrences based on the current
state of the process.
state transition. In Distributed Systems Management (DSM), a condition that exists when
processes are in transition from one state to another. State transitions for PROCESS
objects include ABORTING, STARTING, STOPPING, and SUSPENDING. This term
may also be referred to as a summary state transition.
Subsystem Control Facility (SCF). A part of DSM, it is used to provide a common,
interactive management interface for configuring, controlling, and collecting information
from HP data communications products.
Subsystem Control Point (SCP). A network management process for receiving and
redistributing the messages that SCF sends to certain data communications
subsystems.
superpath. In Expand, the SUPERPATH modifier enables the multi-CPU path feature. See
also multipacket frame.
SVC. See switched virtual circuit (SVC).
SWAN concentrator. See ServerNet wide area network (SWAN) concentrator.