SNAX/XF and SNAX/APN Configuration and Management Manual

SNAX/XF Passthrough
SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
5-2
Processing Messages from SNA Peripheral Nodes
In addition, SNA host applications may be configured optionally as LUNS applications
(through ESS table entries). This type of configuration is called LUNS passthrough.
LUNS passthrough allows SNA devices to switch transparently between SNA host
applications and HP LUNS applications and provides other benefits, such as character-
coded logons and menu displays.
Remote passthrough can occur between SNA peripheral nodes attached to one P
system and an SNA host attached to a separate NonStop system. SNAX/XF must be
running on both systems and the SNAX service managers both must be named
$SSCP.
Processing Messages from SNA Peripheral
Nodes
Figure 5-1 on page 5-3 shows the steps that SNAX/XF takes to process messages
received from attached SNA peripheral nodes.
Logon request format HP
format
HP
format
IBM
format
INIT-SELF requests flow from SNA
devices to SNA host
No No Yes
USS messages flow from SNA host to
SNA devices
No No Yes
Table 5-1. Types of Passthrough (page 2 of 2)
Function Dynamic Associated Static