Lenovo Flex System x440 Compute Node Installation And Service Manual page 862

1. Make sure that all ports for the connection path are enabled and that you can ping the Flex System
Manager management node. If you are unable to ping the Flex System Manager management node, see
"Cannot ping the Flex System Manager management node on the data network" on page
2. Make sure that the protocols you are using are enabled.
Note: By default, only secure protocols are enabled, for example, SSH and HTTPS.
3. If you cannot log into the Flex System Manager management node, see
System Manager management node" on page
Cannot communicate with the CMM
Use the information in this section to troubleshoot the compute node when you cannot communicate with
the CMM.
Action
Note: Communications errors from compute nodes can take up to 20 minutes to appear in the CMM event
log.
Complete the following steps until the problem is solved:
1. Make sure that the protocols that you are using are enabled.
Note: By default, only secure protocols, such as, SSH and HTTPS, are enabled.
2. Use a serial cable to connect to the I/O module to further isolate the problem.
3. Reset the CMM to the default settings by pressing the reset button on the CMM.
Cannot communicate with the I/O module
Use the information in this section to troubleshoot the compute node when you cannot communicate with
the I/O module.
Action
Complete the following steps until the problem is solved:
1. Make sure that the protocols that you are using are enabled.
Note: By default, only secure protocols, such as, SSH and HTTPS, are enabled.
2. Use a serial cable to connect to the I/O module to further isolate the problem.
One or more compute nodes are unable to communicate with SAN
Use the information in this section to troubleshoot one or more compute nodes are unable to communicate
with SAN.
• Make sure that:
1. The I/O module is powered on and the appropriate ports are enabled on the I/O module.
2. The CMM has reported that the I/O module has completed POST and that no errors have been
reported in the logs.
3. The SAN device is powered on and is functional.
4. 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 applicable ports.
• See the documentation for the I/O module for additional information about troubleshooting SAN
connectivity or network connectivity issues.
Complete the following steps until the problem is solved:
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"Cannot log in to the Flex