A practiced method for problem resolution is to first identify
the problem and then identify alternative causes of that problem.
Break the big problem into smaller, more manageable components.
By breaking the problem into manageable and testable components,
the cause can be easily isolated. A recommended troubleshooting
pathway is shown in Figure 2-1 “Title not available (Troubleshooting Pathway)”.
Figure 2-1 Title not available (Troubleshooting Pathway)
![[gfx5]](img/gfx5.gif)
Each of the numbered circles is a task used to troubleshoot
problems in networking environments. By completing these tasks,
isolation of the cause of the problem is likely to occur; this is
the most difficult part of troubleshooting. After the cause of the
problem has been identified, take an appropriate action to resolve
the problem. Each task is described below.
Troubleshooting at the Device. First,
do some simple verifications at the device. This can rule out causes
such as improper device settings and loose connections. Simple observations
can also indicate if the problem is system-wide. The verifications
require no particular expertise; they are appropriate for general
users. After this, it will be clear if more detailed device, DTC,
or LAN testing is needed.
Testing DTC-Device Connections. If necessary, use
TermDSM for more detailed diagnostics. This must be done at another
device or the console. Test DTC-device connections first. This can
detect faults within the device, the device cable, and parts of
the DTC circuitry. If DTC-device connections are not causing the
problem, further DTC diagnostics are suggested.
Testing the DTC. Using TermDSM, perform a DTC selftest.
The selftest can detect faults within specific field replaceable
units (FRU) of the DTC. If the DTC passes the selftest, the fault
might be in the LAN. Proceed with LAN diagnostics.
Testing the LAN. LAN troubleshooting is beyond the
scope of this manual. It generally requires special tools and the
expertise of an HP support representative.
Procedures to follow for the first three tasks in the troubleshooting
pathway for host-based management are summarized in the following
sections.
