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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.

  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.
  2. Make sure that the protocols that you are using are enabled.
  3. Note: By default, only secure protocols are enabled, for example, SSH and HTTPS.
  4. 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.
  5. 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.