SNAX/XF and SNAX/APN Configuration and Management Manual

SNAX/XF and SNAX/APN Configuration and Management Manual—425836-006
6-1
6
SNAX/APN Advanced Program-to-
Program Communication (APPC)
SNAX/APN enables a NonStop system to function as a LEN or end node, enabling HP
LUs to communicate using APPC with:

LUs in directly-attached type 2.1 nodes.

LUs accessible through an attached APPN network node.
Type 2.1 nodes come in many forms, including IBM AS/400 systems, SNA subarea
networks, and systems running OS/2.
Connections between the NonStop node and the adjacent 2.1 node can be
point-to-point or multipoint. Applications on the NonStop system must use LU 6.2
sessions by using SNAX/APC as the API.
The rest of this section is structured as follows:

Multiple and parallel sessions

XID validation

Configuring SNAX/APN

Configuring SNAX/APC

Configuring partner 2.1 nodes
Multiple and Parallel Sessions
SNAX/APC and SNAX/APN together allow HP LUs to simultaneously hold:

Sessions with several partner LUs (multiple sessions)

Several sessions with a single partner LU (parallel sessions)

Any combination of the above (multiple parallel sessions)
These are illustrated in Figure 6-1
on page 6-2 (TNLUx and IBMLUx identify various
LUs).
Note. Network nodes perform intermediate session routing and act as servers for attached
nodes. They maintain a dynamic directory of LUs in the APPN network and respond to session
requests by searching the directories of other network nodes to find the location of the
requested LU. These directories eliminate the need to enter location and routing information for
all LUs.