SNA Link/iX Node Managers Guide (30291-90507)

118 Chapter5
SNA Link Troubleshooting
The Logging Facility
Token Ring Link Logging
Token ring link logging records informational messages and error
messages generated by the token ring link. It is controlled through the
MPE commands SHOWNMLOG, SWITCHNMLOG, and RESUMENMLOG. These
commands enable the node manager to determine the number of and
available space in the current NM log file (NMLG
nnnn .PUB.SYS, where
nnnn is a number from 0000 through 9999), close the current NM log
file and open a new one, and activate logging after a recoverable error.
The MPE commands are described in Chapter 6 , “MPE Commands,” of
this manual.
The NM log file can be formatted through the NMDUMP utility. Using
NMDUMP for the token ring link (including an example of the token
ring link logging format) is described later in this chapter.
More-detailed information about NMDUMP is contained in Using the
Node Management Services Utilities.
The logging subsystem number for token ring link is SUB0061, and
these are the class numbers:
• CLAS0001: errors
• CLAS0002: warnings
• CLAS0003: informational messages
Link Trace Logging
Link trace logging records only errors encountered when starting or
stopping SDLC link-level tracing. Link errors are
not logged in this
class and subsystem (see “SDLC Link Logging” and “X.25 Link
Logging” above). Many of the messages correspond to NMERR
messages, which are documented in Using the Node Management
Services Utilities. (Note that the error number printed in the logging
record is an internal number and does not correspond to the NMERR
message number.)
Link trace logging is controlled through the MPE commands SHOWLOG,
SWITCHLOG, and RESUMELOG. These commands enable you to determine
the name of and available space in the current system log file
(LOG
nnnn .PUB.SYS, where nnnn is a number from 0000 through 9999),
close the current system log file and open a new one, and activate
logging after a recoverable error. The MPE commands are described in
the MPE/iX Commands Reference Kit.
The system log file can be formatted by your Hewlett-Packard support
contact, using the Diagnostic User Interface (DUI).
The logging subsystem number for the link trace is
SUB0018 , and it has
only one class number: CLAS0000.