Lenovo Flex System x440 Compute Node Installation And Service Manual page 864

Two or more compute nodes are unable to communicate during initial setup
Use the information in this section to troubleshoot two or more compute nodes that are unable to
communicate 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 (such as an I/O module or
CMM), install the previous level of firmware.
2. Make sure that:
a. The I/O module is powered on and the applicable ports are enabled on the I/O module.
b. 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 applicable ports.
3. From the compute node operating system, verify the network settings, such as IP address, subnet mask
(if you are 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
http://www.ibm.com
release notes for a firmware update to determine the issues that are addressed by the update.
6. Check the Support website for any service bulletins that are related to network connectivity.
7. (Trained service technician only) Complete 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. See the
System Enterprise Chassis Types 8721, 8724, and 8725: Installation and Service Guide" at http://
pic.dhe.ibm.com/infocenter/flexsys/information/topic/com.lenovo.acc.8721.doc/product_ page.html
d. Remove the I/O module and install a working I/O module in the same I/O bay.
e. If the problem is solved, replace the I/O module that you removed.
f. If the problem persists, replace the chassis midplane.
Two or more compute nodes experience a sudden loss of connectivity
Use the information in this section to troubleshoot two or more compute nodes that experience a sudden
loss of connectivity.
The event is logged in the event log. See the event log for the management node (if available) or see the
event log of the CMM to determine what actions might be required to resolve this issue. See
on page 65.
Cannot log in
Use the information in this section to troubleshoot the compute node when you cannot log in to the
management node, the CMM, or the I/O module.
Cannot log in to the Flex System Manager management node
Use the information in this section to troubleshoot the compute node when you cannot log in to the
management node.
Action
Complete the following steps until the problem is solved:
1. Make sure that you are using the correct password and that the capitals lock is off.
Lenovo Flex System x440 Compute NodeInstallation and Service Guide
854
for any firmware updates that might apply to this issue. You can view the
"Flex
.
"IMM event log"