SNAX/XF LU Network Services Manual

LUNS Configuration Tables
Introduction to LUNS
097841 Tandem Computers Incorporated 1–7
Logon Records for Pathway Programs. LUNS does not know Pathway applications by
their subdevice names, because no subdevice names are specified for them through
SCF ADD APPL commands. Logon records for Pathway applications therefore take a
different form than those for a TACL process.
Like a logon record for a TACL process, a logon record for a Pathway application has a
character-coded command within its record-name field. Its subdevice-name field,
however, contains not the subdevice name of the application itself, but that of the
Tandem Creator process. It is the concatenated-data field that contains the names of a
PATHMON and a destination Pathway application.
Logon Records for Passthrough Sessions. Records establishing passthrough sessions with
a host process can take several forms. All such records are discussed in detail under
“Building the ESS Tables” in Section 2. Below is a brief overview of passthrough
records:
When such a record has a character-coded command for its record-name field, the
field that would otherwise contain a subdevice name either:
Contains a DLU name if LUNS is to send the host process an INIT-SELF
request.
Remains unused if LUNS is to pass the character-coded command to the host.
In this case, a destination process on the host need not be explicitly identified,
because the host is responsible for interpreting the character-coded command
entered by the user.
When a Tandem ESS table record has a DLU name for its record-name field, that
type record is used to route an INIT-SELF request to the host. The INIT-SELF is
routed through a gateway LU as specified in the record.
Logoff Records
Logoff records allow terminal users to log off from application processes.
Order Records
To dynamically establish a host SSCP-LU session, the system programmer must
include an order record in the ESS table. The SNAXUTL ADD ESSCMD command
operand STATIC ON must be specified.
To terminate the host SSCP-LU session and reestablish the Tandem SSCP-LU session,
the system programmer must include an order record in the ESS table. The SNAXUTL
ADD ESSCMD command operand STATIC OFF must be specified.