NS3000/iX Operations and Maintenance Reference Manual (36922-90039)

136 Chapter7
Commands
NETCONTROL TRACEON and TRACEOFF
Discussion
The tracing functions allow you to enable collection of internal
information about what the various transport modules are doing, or
what packets are being sent and received at the transport level.
Using TRACEON you instruct a specific module not only to begin tracing,
but also what kind of data to trace and what file to put it in. Tracing
continues until explicitly stopped via a matching TRACEOFF command,
or until the specified module, or all of transport, is stopped. If multiple
modules had tracing enabled to capture a problem, stopping transport
is the usual way to stop all tracing.
For most problems you will need to enable TCP tracing, and for IP
store-and-forward problems you should enable IP tracing; see the
examples for sample commands. For link-related problems you should
enable link tracing (see the LINKCONTROL command). Other NS tracing
can be enabled under the guidance of your HP support representative.
When tracing is enabled successfully, the name of the active trace file is
displayed. You should write this down as it will not be repeated at
TRACEOFF time; otherwise, to determine which trace file contains the
desired data, check trace file creation times by using :LISTF
NMTC####.PUB.SYS,3.
As soon as your problem has been duplicated, you should stop tracing to
avoid having the file “wrap” and overwrite the data. At completion of
tracing, a trace file may be formatted using the NMDUMP.PUB.SYS
utility. Much of the information traced will be meaningful only to
HP support personnel.
NI Type:
Valid Network Interface
Protocol Names
LAN IP, PROBE, ARP
TOKEN
IP, ARP
FDDI
IP, ARP
100VG-AnyLAN
IP, PROBE, ARP
100Base-T
IP, PROBE, ARP
ROUTER
IP, DIAL
X.25
IP, X25
GATEHALF
IP, DIAL
LOOP
IP