IBM Flex System p24L Installation And Service Manual page 433

Connectivity problems
Identify connectivity problem symptoms and the corrective actions to take.
v Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v See Chapter 7, "Parts listing for IBM Flex System p24L Compute Node," on page 79 to determine which
components are CRUs and which components are FRUs.
v If an action step is preceded by "Trained service technician only," that step must be performed only by a
trained service technician.
Symptom
One or more compute nodes
are unable to communicate with
the SAN
Action
1. Complete the following items:
a. The I/O module is powered on and the appropriate ports are enabled on
the I/O module.
b. The IBM Chassis Management Module (CMM) has reported that the I/O
module has completed POST and that no errors have been reported in the
logs.
c. The SAN device is powered on and is functional.
d. All cables between the I/O module and the SAN device are properly
connected and secure, and that the activity LEDs are lit on the appropriate
ports.
2. See the documentation for the I/O module for additional information about
troubleshooting SAN connectivity or network connectivity problems.
Chapter 8. Troubleshooting
421