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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.

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.