SNAX/XF and SNAX/APN Configuration and Management Manual

Objects for SNAX/XF and SNAX/APN
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
12-5
LU Objects
LU Objects
An LU object refers to an SNA logical unit, sometimes referred to as a local LU in the
NonStop node, and a remote LU if in another node. When SNAX/APC is used with
SNAX/APN for Advanced Program-to-Program Communication (APPC), an LU can
support one or more sessions.
SNAX/XF LU Objects
SNAX/XF LU objects can be subordinate to either a LINE object or the SUBSYS
object. If subordinate to the SUBSYS object (representing the service manager), they
are called switched floating LU objects. When a switched floating LU object serves a
dial connection, the LU is subordinate to the dial line.
SNAX/APN LU Objects
SNAX/APN LU objects are always subordinate to a LINE object. SNAX/APN requires
that two classes of LU objects be subordinate to a line: local LU objects, which
represent resources on the local system, and remote LU objects, which represent
external resources. Thus, there are local LUs subordinate to the predefined local PU
and remote LUs subordinate to remote PUs. Both classes of LUs must have their
TYPE attribute specified as (14,21). The SNANAME attribute must also be specified for
both classes of LUs. SNANAME should contain the SNA network name of the LU.
Local LU Objects
Local LU objects, which represent local resources, must be explicitly defined. When
SNAX/APN is used with SNAX/APC, these are the LU objects that SNAX/APC opens.
When configuring a local LU object, you do not need to specify the PUNAME attribute
in the ADD LU or ALTER LU command. A local LU object is automatically subordinated
to #ZNT21, the local PU object, which is configured automatically; see PU Objects
on
page 12-7.
When you use the extended logon facility (XLF) for remote logon by 3270 devices, you
must configure a local LU object to represent the SNAX/APN Logon Manager
(TLOGMGR). Applications cannot open this LU. You can configure multiple
TLOGMGRs by adding multiple TLOGMGR LUs.
Remote LU Objects
Remote LU objects, which represent resources in an adjacent node or network, can be
added dynamically: that is, without the user explicitly adding them through an ADD
command. If the DYNAMIC attribute of the remote PU is specified as ON, then
whenever a BIND request is received from a remote LU that is not in the SNAX/APN
configuration, an LU object is automatically added to the configuration.