SNAX/XF and SNAX/APN Configuration and Management Manual

SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
5-1
5 SNAX/XF Passthrough
SNAX/XF passthrough allows SNA peripheral nodes on SNAX/XF primary lines to
communicate with SNA hosts on SNAX/XF secondary lines. SNAX/XF makes the
connection between the primary and secondary LINE, PU, or LU objects.
SNAX lines, PUs, and LUs used for SNA host communication are called gateway
lines, PUs, and LUs. When configured for passthrough, gateway LUs are also called
passthrough LUs.
The rest of this section is structured as follows:

Types of passthrough

Processing messages from SNA peripheral nodes

Configuring SNAX/XF passthrough

Configuring LUNS passthrough
Types of Passthrough
SNAX/XF passthrough operates by connecting objects on primary and secondary lines
in one of three ways:

Dynamic passthrough

Associated passthrough

Static passthrough
Table 5-1 compares the functions supported by the three types of passthrough.
Table 5-1. Types of Passthrough (page 1 of 2)
Function Dynamic Associated Static
SNA devices can initiate sessions with
SNA host applications
Yes Yes Yes
SNA host applications can initiate
sessions with SNA devices
No Yes Yes
Gateway LUs are usable by applications
on the NonStop system
Yes Yes No
Access to SNA host applications is
controlled by SNAX/XF (in LINE
APPLID)
Yes Yes No
Logon requests flow directly from SNA
devices to SNA host
No No Yes