Cannot communicate with the I/O module
Use the information in this section to troubleshoot the chassis when you cannot communicate with the I/O module.
Complete the following steps until the problem is solved:
- Make sure that the correct 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 for more information.
- Make sure that the protocols that you are using are enabled.NoteBy default, only secure protocols are enabled, for example, SSH and HTTPS.
- 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.
- Use a serial cable to connect to the I/O module to further isolate the problem.