Lenovo Flex System x480 X6 Compute Node Installation And Service Manual page 956

Cannot connect to the data network (Ethernet)
Use the information in this section to troubleshoot the compute node when you cannot connect to the
data network (Ethernet).
One compute node experiences a sudden loss of network (Ethernet) connectivity
Use the information in this section to troubleshoot one compute node experiences a sudden loss of network
(Ethernet) connectivity.
The event is logged in the event log. See the event log for the IBM Flex System Manager management
node (if installed) or see the event log of the CMM to determine what actions might be required to resolve
this issue. See IMM event log.
One compute node is unable to connect to the data network (Ethernet) during initial setup
Use the information in this section to troubleshoot one compute node is unable to connect to the data
network (Ethernet) during initial setup.
1. 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 correctly connected
and secure, and that the activity LEDs are lit on the applicable ports.
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 IBM 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 IBM Support. See Removing a compute node from a chassis.
7. Install the compute node in another compute node bay to determine whether the problem remains. See
Installing a compute node in a chassis. 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 IBM 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 "IBM Flex
System Enterprise Chassis Types 8721, 8724, and 8725: Installation and Service Guide".
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.
Related Links:
946
Lenovo Flex System x280 X6, x480 X6, and x880 X6 Compute Node Installation and Service Guide