Configuring and Managing Host-Based X.25 Links - Edition 5 (36939-90054)

Chapter 1 23
Introduction
Maintenance
Level 2 Trace
If you choose trace option 2, level 2 trace, you will be prompted for the
filter (trace headers only or full packets) and given the option of
specifying a file name. No other information is required.
Level 3 Trace
If you choose trace option 3, level 3 trace, you will be prompted for a VC
type. Possible responses are PAd, to trace only PAD VCs, SYs, to trace
system-to-system VCs, or All, to trace both PAD and system-to-system
VCs that are active through the designated DTC and card. You will also
need to specify the link name of the X.25 link. You will then be
prompted for the filter (trace headers only or full packets) and given the
option of specifying a file name.
For a complete description of TermDSM and its use with all DTC
connection card options, see Troubleshooting Terminal, Printer, and
Serial Device Connections manual.
Trace Formatting
The trace file can be formatted with the NMDUMP utility. Enter
option 2 at the prompt “Would you like to format a log or trace file” then
select subsystem ID 60 for DTC/X.25 Link. For more information, refer
to Using the Node Management Services (NMS) Utilities manual.
Logging
Logging for host-based X.25 links is enabled and disabled in the
NMMGR configuration file, as is the case for other link products.
However, host-based X.25 log files are formatted through a tool called
EVLOG (you cannot use the NMDUMP formatter for host-based log
files). See Chapter 8, “Formatting Host-Based X.25 Log Files,” for
instructions on using the EVLOG formatter.
Event Log Files
Events are logged to two alternating log files for each DTC. When you
bring the DTC up, it immediately begins logging to the first log file. The
DTC records events to that file until too few bytes are available for the
next log record entry. At this point, the DTC begins recording to the
second log file. Alternating log files in this manner assures that at least
five hundred records are always available for formatting and
evaluation.
Log File Name Format
The format of the log file names is as follows:
HnnnnnnA.PUB.SYS
(first log file)