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• The CMM has reported that the I/O module has completed POST and that no errors have been
reported in the logs.
• The SAN device is powered on and is functional.
• 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 issues.
Connectivity problems
Use this information to resolve issues related to the connectivity between the compute node and the
Ethernet network.
• "A compute node cannot connect to the data network (Ethernet) during initial setup" on page 105
• "Intermittently, a compute node cannot connect to the data network (Ethernet)" on page 105
• "Multiple compute nodes cannot connect to the data network (Ethernet) during initial setup" on page 106
• "Intermittently, multiple compute nodes cannot connect to the data network (Ethernet)" on page 106
A compute node cannot connect to the data network (Ethernet) during initial setup
Complete the following steps until the problem is solved:
1. If you have just updated the firmware for one or more devices in the chassis (I/O module, CMM, etc),
install the previous level of firmware.
2. Make sure that:
• The I/O module is powered on and the appropriate ports are enabled on the I/O module.
• All cables between the I/O module and the network device (switch or router) are properly connected
and secure, and that the activity LEDs are lit on the appropriate ports.
3. From the compute node operating system, verify the network settings, such as IP address, subnet mask
(if using IPv4), DHCP settings, and vLAN settings, to ensure that the settings match the settings of the
network device. See the documentation for the operating system for information about checking
network settings.
4. From the compute node operating system, make sure that the network device is active. See the
documentation for the operating system for information about viewing network devices.
5. Check the Lenovo support Web site for any firmware updates that might apply to this issue. You can
view the release notes for a firmware update to determine the issues addressed by the update.
6. Check the Lenovo support Web site for any service bulletins that are related to network connectivity.
7. (Trained service technician only) Perform the following steps:
a. Force the Link/duplex speed.
b. Check the connectors on the I/O module to ensure that there are no bent pins.
c. Check the connectors on the chassis midplane to ensure there are no bent pins.
d. Remove the I/O module and install a working I/O module in the same I/O module bay.
e. If the problem is resolved, replace the I/O module that you removed.
Intermittently, a compute node cannot connect to the data network (Ethernet)
Complete the following steps until the problem is solved:
1. Make sure that the network cables are correctly connected in the switch module ports and the switch
module is correctly seated.
2. Update the NIC device driver, or the storage device controller device driver.
.
Chapter 4
Problem determination
105
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