Lenovo Flex System x220 Installation And Service Manual page 625

2. 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.
3. 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.
4. Make sure that the proper device drivers are installed for the compute node Ethernet device.
5. Check the Support website for any firmware updates that might apply to this issue. You can view the
release notes for a firmware update to determine the issues that are addressed by the update.
6. Remove the compute node from the chassis and check the connectors at the back of the node for
bent pins. If the pins are bent, contact Support. See "Removing a compute node from a chassis" on
page 639.
7. Install the compute node in another compute node bay to determine whether the problem remains.
See "Installing a compute node in a chassis" on page 639. If the problem remains, make sure that
this compute node is connected to a port that has been enabled and that the vLAN settings enable
that port to connect to the network.
8. Check the Support website for any service bulletins that are related to network connectivity.
9. (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 "Flex
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.
One compute node experiences a sudden loss of network (Ethernet) connectivity
Use the information in this section to troubleshoot one compute node that experiences a sudden loss of
network (Ethernet) connectivity.
See the event log for the Flex System Manager management node (if installed) or see the CMM event log to
determine what actions might be required to resolve this issue. See "IMM event log" on page 63.
Two or more compute nodes are unable to connect to the data network (Ethernet) during initial setup
Use the information in this section to troubleshoot two or more compute nodes that are unable to 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 (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 appropriate ports are enabled on the I/O module.
b. All cables between the I/O module and the network device (switch or router) are correctly 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 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.
.
Chapter 6 Troubleshooting
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