CMM cannot ping the CMM in a different chassis

Complete the following steps until the problem
is solved:

Make sure that the Chassis Management Modules are powered on and the applicable ports are enabled. 

If the CMM is
powered on and hung, reset the CMM.

Make sure that the IMM, the management node, and the CMMs
are all on the same subnet.




Verify that the cables between the CMMs
and the top-of-rack switch are correctly connected and that the activity
LEDs are lit on the applicable ports.

Make sure that the management node has a correct IP address and
is on the same subnet as the CMMs. 

Make sure that the compute node IMMs have acquired IP addresses
from the CMM by using the Setup utility on each node.
Note: If the CMM recently
lost connection to the DCHP server, you must to reset the IMMs by
using the CMM interface so that new IP addresses can be acquired.


In the CMM user
interface, click Chassis Management > Component IP Configuration and make sure that the IP address that is listed is the same as
the IP address that is displayed in the Setup utility. If it is not
the same IP address, configure the IMM network settings correctly
or reset the IMM to automatically acquire a new IP address. 

Check the Lenovo Support Portal for
any firmware updates that might apply to this problem. You can view
the release notes for a firmware update to determine the issues that
the update addresses. 

Check the Lenovo Support Portal for
any service bulletins that are related to network connectivity.

Remove the Flex System x222 Compute Node from the chassis and check the connectors on the back
of the node and on the midplane for bent pins. If the pins are bent,
contact Support.

(Trained service technician only) Complete the following steps: 

Force the link/duplex speed. 

Check the connectors on the nodes and on the midplane to make
sure that no pins are bent.

Replace the I/O expansion card in the management node.

Replace the management node.