User guide

156 DC 900-1333P
Freeway User Guide
4.6 Trace Functions
The current trace status is shown in parentheses in the Trace Function option in the
Freeway Interactive Menu. To access the Trace Functions menu as shown in
Figure 4–31, enter ‘4’ at the Freeway Interactive Menu.
Enter ‘2’ to turn trace on. Freeway then saves messages moving to and from the client in
a circular buffer. When trace data fills the buffer, the oldest trace data is overwritten
with new trace data.
Note
To capture the trace data to a file on the boot server, the user
defined in
FTP User Name in the System Boot Parameters menu
(page 149) must have write privileges in the system
boot directory
on the boot server.
Enter ‘3’ to turn trace off, then enter ‘4’ to process the trace data. The messages in the
trace buffer are in binary form to save space. The messages are converted to ASCII
before being written to the boot server.
All messages are TSI messages. The TSI data area can encapsulate a DLI message, which
gives you more information. The messages can be interpreted in the following ways:
• as a TSI header and a TSI data area
• as a TSI header, a TSI data area, a DLI header, and a DLI data area
You are prompted for the trace level, TSI or DLI. Refer to the Freeway Data Link Inter-
face Reference Guide or Freeway Transport Subsystem Interface Reference Guide for trace
information examples. You are then prompted to enter a file name and press <return>.
A ‘snapshot’ of the current trace data is then written to the specified file located in the
system
boot directory on the boot server. For the path name of this directory, see the
Display Boot Parameters screen (page 129).