SNAX/HLS Configuration and Control Manual
Using HLSCMI to Create a SNAX Loop-Back Environment
Installing SNAX/HLS
3–12 104705 Tandem Computers Incorporated
Using HLSCMI to
Create a SNAX/XF
Loopback
Environment
SNAX/HLS requires a Tandem SNA access method, (SNAX/XF for example) for SNA
communication. Prior to SNAX/HLS initialization, the system programmer should
define the environment for the particular Tandem SNA access method being used. For
more information on the Tandem SNA access methods SNAX/XF and SNAX/CDF
refer to the manuals listed in the Preface. The information in this subsection is specific
to SNAX/XF and does not apply to SNAX/CDF.
It is suggested that a simple loopback configuration be installed for application testing
and SNAX/HLS education. Such a configuration loops a SNAX/XF primary line
through a modem eliminator to a SNAX/XF secondary line. In essence, one
SNAX/XF line “talks” to the other SNAX/XF line. This permits initial program
verification and SNAX/HLS education to proceed without involving the host or other
I/O devices.
Such a loopback configuration can be created by using HLSCMI, a TACL macro
supplied with the distribution. This HLSCMI macro is invoked as follows:
HLSCMI PRI
line-name
, SEC
line-name
[ ,
option
]...
PRI
line-name
specifies the name of the primary line. This argument is required.
SEC
line-name
specifies the name of the secondary line. This argument is required.
option
specifies the number of entities to configure, where
option
is one of the
following:
PU
count
specifies the number of PUs to define on each line. If omitted, three PUs are
defined.
LU
count
specifies the number of LUs to define on each PU. If omitted, five LUs are
defined.
UTIL
CMI | SCF
specifies the interface used by the HLSCMI macro. On all C-based Guardian
systems (for example, C20) the macro defaults to the use of the
Communications Management Interface (CMI) to set up the loopback
environment. However, you can override the default and specify the
Subsystem Control Facility (SCF) with this option.
The product of the PU and LU counts must lie between 1 and 200.