Expand Configuration and Management Manual (G06.24+)

Subsystem Control Facility (SCF) Commands
Expand Configuration and Management Manual—523347-008
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SCF and the WAN Subsystem
SCF and the WAN Subsystem
On NonStop S-series servers, you use the SCF interface to the WAN subsystem to
create $NCP and the Expand line-handler processes. You can also use the SCF
interface to the WAN subsystem to perform certain network-management tasks. The
SCF interface to the WAN subsystem is described in the WAN Subsystem
Configuration and Management Manual.
The following list explains when to use the SCF interface to the Expand subsystem
versus when to use the SCF interface to the WAN subsystem:
•
Use the SCF interface to the WAN subsystem to add $NCP and the Expand line-
handler processes to the system.
•
You can use either the SCF interface to the Expand subsystem or the SCF
interface to the WAN subsystem to change modifier values for Expand line-handler
processes and $NCP. Consider the following when choosing which SCF interface
to use:
°
Changes made with the SCF interface to the Expand subsystem are temporary
(they do not remain across system loads) while changes made with the SCF
interface to the WAN subsystem are permanent (they do remain across system
loads).
°
You can change any Expand modifier using the SCF interface to the WAN
subsystem (ALTER DEVICE command).
°
You can change most, but not all, Expand modifiers using the SCF interface to
the Expand subsystem (ALTER LINE and ALTER PATH commands). Most
Expand modifiers have corresponding attribute names in Expand SCF.
°
Certain Expand SCF attributes do not correspond to Expand modifiers. You
can change these attribute values only by using the SCF interface to the
Expand subsystem.
°
Use the Expand subsystem STOP LINE or STOP PATH command before you
change attribute values using the ALTER LINE or ALTER PATH command.
°
Use the WAN subsystem STOP DEVICE command to stop an Expand line-
handler process before you change modifier values using the ALTER DEVICE
command.
•
The SCF interface to the WAN subsystem treats Expand line-handler processes
and $NCP as devices (DEVICE object). It does not provide LINE, PATH,
PROCESS, or ENTRY objects for the Expand subsystem. Do not confuse the WAN
subsystem PATH and PROCESS objects with the Expand subsystem PATH and
PROCESS objects.
•
Use the WAN subsystem START DEVICE command to start an Expand line-
handler process in the primary and backup processors. Use the Expand
subsystem START PATH or START LINE command to start path and line functions
once the Expand line-handler process is started.