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Cannot communicate with the CMM

Use the information in this section to troubleshoot the compute node when you cannot communicate with the CMM on the data network.

Note
reCommunications 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 all ports in the connection path are enabled and that you can ping the CMM. If you are unable to ping the CMM, see Cannot ping the CMM on the management network.
  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 CMM. If you are unable to log in to the CMM, see Cannot log in to the CMM.
  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.