Lenovo Flex System x220, Инструкция по установке и обслуживанию

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3. Make sure that you can log into the CMM. If you are unable to log in to the CMM, see “Cannot log in
to the CMM” on page 618.
4. Reset the CMM to the default settings by pressing the reset button on the CMM.
Note: Press and hold the button for 10 seconds to reset the CMM configuration settings. All user
modified configuration settings are reset to the factory default values.
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.
Complete the following steps until the problem is solved:
1. Make sure that all ports in the connection path are enabled and that you can ping the I/O module. If you
are unable to ping the I/O module, see “Cannot ping the I/O module” on page 621.
2. Make sure that the protocols that you are using are enabled.
Note: By default, only secure protocols are enabled, for example, SSH and HTTPS.
3. Make sure that you can log into the I/O module. If you are unable to log into the I/O module, see
“Cannot log in to the I/O module” on page 618.
4. Use a serial cable to connect to the I/O module to further isolate the problem. You can also link to the
I/O module through an external Ethernet port.
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.
Complete the following steps until the problem is solved:
1. Make sure that:
a. The I/O module is powered on and the applicable ports are enabled on the I/O module.
b. The CMM has reported that the I/O module has completed POST and that no errors have been
reported in the logs.
c. The SAN device is powered on and is functional.
d. 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.
2. See the documentation for the I/O module for additional information about troubleshooting SAN
connectivity or network connectivity issues.
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 is unable to connect to the data network (Ethernet) during initial setup
Use the information in this section to troubleshoot one compute node that is unable to connect to the data
network (Ethernet) during initial setup.
Complete the following steps until the problem is solved:
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.
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Flex System x220 Compute Node Installation and Service Guide