APPC Subsystem on MPE/XL Node Manager's Guide (30294-90007)

136 Chapter6
Troubleshooting the APPC Subsystem
Startup Problems
6. Check for hardware problems. Check that all hardware is installed
properly and working correctly. Make sure that the proper cabling
has been installed and connected and that the modems are turned
on and working properly. Many problems are related to such things
as incompatible modems, bad phone lines and cables and so forth.
7. Check for activity on the line. Make sure the line is active (being
polled) and the remote system's teleprocessing subsystem (for
example, VTAM) is active. You might need to use a line monitor to
determine whether the line is being polled and to determine the
addresses being polled. The standard HP line monitor (HP 4953 or
4951) with the SDLC package can be used.
If a PSI failure has occurred, give the file NETDMP
xx .PUB.SYS ( xx can
equal 00 through 99) to your HP representative for analysis.
8. If you have thoroughly checked out all installation and configuration
items, and the HP 3000 link still does not activate, perform a link
level trace. Link level tracing is described in the SNA Link/XL Node
Manager’s Guide.
When the problem has been reproduced, turn off link level tracing,
and give the trace file to your HP representative for analysis.
9. Print a copy of the output from the NMMAINT program to record
the software versions, and give this to your HP representative.
10.If data is being received on the link, but the node is not starting up,
examine the SNA Transport node trace. The node trace can be
enabled at startup with the SNACONTROL START command. For more
information, see the SNA Link/XL Node Manager’s Guide.
APPC Subsystem Problems
To determine whether the APPC subsystem has activated properly,
issue the APPCCONTROL STATUS command, described in Chapter 2 ,
“Interactive Control Operator Commands,” of this manual. The Number
of Active Sessions listed in the APPCCONTROL STATUS display should
be equal to the Automatically Activated Sessions value for each
configured session type. This section describes some troubleshooting
procedures to be used when the APPC subsystem does not activate
properly.
1. Validate the configuration file. The NMMGR validation utility cross
checks references to SNA nodes and LUs to ensure that they are
configured consistently between the SNANODE and APPC branches
of NMMGR. The NMMGR validation utility is documented in Using
the Node Management Services Utilities.