Lenovo Flex System x220 Installation And Service Manual page 626

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 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. 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 "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.
Two or more compute nodes experience a sudden loss of network (Ethernet) connectivity
Use the information in this section to troubleshoot two or more compute nodes that experience a sudden
loss of network (Ethernet) connectivity.
See the event log for the Flex System Manager management node (if installed) or the CMM event log of the
CMM to determine what actions might be required to resolve this issue. See "IMM event log" on page 63.
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.
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.
2. Contact Support for further assistance if you have forgotten the password.
For additional information about Login problems, see Login problems at
http://pic.dhe.ibm.com/infocenter/ flexsys/information/index.jsp?topic=%2F com.ibm.acc.8731.doc%2F
troubleshooting_web_interface_problems.html in the "Lenovo Flex System Chassis Management Module
User's Guide".
Cannot log in to the CMM
Use the information in this section to troubleshoot the compute node when you cannot log in to the CMM.
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.
2. Restore the CMM default settings by pressing the reset button on the CMM.
Cannot log in to the I/O module
Use the information in this section to troubleshoot the compute node when you cannot log in to the I/O
module.
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Flex System x220 Compute Node Installation and Service Guide