Expand Configuration and Management Manual (H06.21+, J06.10+)

Troubleshooting
Expand Configuration and Management Manual — 529522-013
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Reporting Network Problems
Common Multi-CPU Path Problems
This is a list of common multi-CPU path problems:
•
You received this EMS message during load balancing: “Network Requests
Aborted.” This message does not indicate that a problem exists; it is generated
when an Expand line-handler process pair is changed and messages that were in
transit are aborted. These messages are retried by the file system.
•
You tried to rebalance the multi-CPU path several times, but the load factors (LFs)
indicate that the paths are still not balanced. First, wait a few minutes; it might take
a while for the ETFs to stabilize at their new values. If the ETFs are still not
balanced after a few minutes, then it is likely that most of the traffic is between just
one or a few pairs of endpoints, making it impossible to spread the load over all the
paths in the multi-CPU path. If this is not the case and the problem is severe, then
stop and restart one path to force traffic to be redistributed.
Reporting Network Problems
If you need to bring a problem to the attention of your HP representative, HP
recommends that you have these information available:
•
A description of the problem (either verbal or written).
•
Any related error messages.
•
Action taken to resolve the problem.
•
Results of traces taken up to the point of failure. (How and when to take a trace is
explained in Tracing.)
•
Memory dumps when the system freezes. (Online dumps are of minimal use.)
•
Other supporting information, such as:
°
System environmental information
°
Results of running utility status-type commands
°
Results of diagnostics
Tracing
Tracing is initiated using the Expand subsystem SCF TRACE command. Tracing
allows HP personnel to see the history of a data communications link, including
significant points in the internal processing of the traced entity. For tracing to be an
effective, fault-finding tool, make sure you follow these guidelines:
•
Always trace both ends of a path.
•
Ensure that all traces for a particular problem are taken at the same time.