SNA IMF/XL Node Manager's Guide (30293-90010)

Chapter 5 43
SNA IMF Troubleshooting
Problem Resolution
can be defined in a higher-level macro, this structure must be
followed: GROUP, LINE, SERVICE, PU, and LU.
A macro could be missing a required operand or an invalid operand
might have been specified for a particular macro.
• Incorrect Logmode table definition.
Ensure that the correct Logmode Table definitions are being used.
The HP SNA Products: ACF/NCP and ACF/VTAM Guide contains
more information about this.
Installation Problems
Some common problems that might occur during installation, or as a
result of improper or unsuccessful installation, are described below.
• Inactive VTAM node.
This is probably the most common problem that occurs on the host.
Ensure that the proper activation commands have been issued.
Setting the ISTATUS operand of the LU macro to ACTIVE will help,
especially if it is moved up to either the GROUP or LINE macro. (The
ACTIVE setting sifts down to all lower-level macros.) This problem
most frequently occurs in a switched line configuration when the
major node containing the VBUILD macro was never activated. In
this case, an inactive macro causes the host to fail to find a match for
the remote’s Exchange Station Identification (XID) number. The only
way you will be aware that this XID problem has happened is a
message at the host operator’s console. To avoid these problems
remember this rule: When in doubt, activate.
• Switched lines.
Be sure the VBUILD macros are in a separate member in the VTAM
parameter library (SYS1.VTAMLST).
• Hardware problems.
Ensure that all hardware is installed properly. Many problems are
related to such things as incompatible modems, bad phone lines and
cables, etc.
Ensure that the host is up, the line is active (being polled), and the
host telecommunications subsystem (for example, VTAM) is active.
You might need to use a line monitor, such as an HP 4953, which
requires the link option to check whether the line is being polled and
to determine the addresses being polled. You also can use one of the
other HP 495x Protocol Analyzers in addition to the standard
HP 4953.