User`s guide

4-1
CHAPTER
4
Troubleshootin
g
Hardware Dia
g
nostic Utility
TTP
, an MS-DOS based diagnostic utility, is included on the SGI Microsoft NT Driver CD-
ROM. This utility is used for verifying that the adapter hardware is functional. It performs
internal and external loopback tests and provides resulting pass/fail information. Perform the
TTP
tests any time you wish to rule out or identify possible adapter hardware problems.
To use the
TTP
utility, follow this procedure:
1. Boot your system in clean MS-DOS mode rather than Windows NT.
N
OTE
–
TTP
cannot
be used from the Windows NT “Start | Run” command or from “Start |
Programs | MS-DOS Prompt.” To use
TTP
, boot your computer in clean MS-DOS mode, with
no other plug-ins, add-ons, or resident programs installed.
2. Disconnect the network cables on all adapters being tested.
The loopback tests will not perform properly if the adapter is left connected to other devices.
3. Connect a loopback cable between the adapter’s RX port and its TX port.
N
OTE
–
The external loopback test requires a loopback cable connecting the adapter’s RX port
to its TX port. If a loopback cable is not used, the external loopback test will fail.
4. Place the SGI Microsoft NT Driver CD-ROM into your system’s CD-ROM drive.
N
OTE
–
If you acquired the diagnostic software on a floppy disk, insert the disk into your sys-
tem’s disk drive. If you acquired the software from the SGI support website, note the path to
where the
ttp.exe
and
dos4gw.exe
files reside on your system.