Knowledge Article: ID B0002201E: Alternate MM communication failed

Description

Standby Chassis Management Module communication is offline

Causes

The management module performs the built-in self test (BIST) that checks the communication between the management module and the alternate management module. If the management module cannot communicate with the other management module, the test fails.

Implications

The primary Chassis Management Module (CMM) cannot communicate with the standby CMM. Logs and setting changes will not be mirrored to the standby CMM.

Resolutions

The problem might correct itself within approximately 2 minutes. If it does not correct itself, complete the following steps until the problem is solved:

1. Perform a service-level reset of the standby CMM, to restart the standby CMM. If the problem has not corrected itself, this event will appear again in the log within approximately 5 minutes.
   
2. Save the configuration from the primary CMM to a file, and restart the primary CMM. This will probably cause a failover to the standby CMM, and the standby CMM will become the primary CMM. If this event does not appear again in the log within approximately 5 minutes, the problem is now corrected. If the CMM configuration was changed while the primary CMM was unable to communicate with the standby CMM, apply the saved configuration to the current primary CMM.
   
3. Replace the current standby CMM. If this event does not appear again in the log after approximately 5 minutes, the problem is now corrected. To prevent failovers that result from minor problems that are related to configuration differences between the CMMs that are not related to CMM hardware failures, consider temporarily removing the standby CMM until you can replace it. If the configurations on the primary CMM and standby CMM are the same, you can disregard this event until you are able to replace the CMM. After you replace the standby CMM, if the problem was in the standby CMM, the new standby CMM will automatically synchronize the firmware and configuration data with the primary CMM. (Older log entries will not be synchronized, but new log entries will start being synchronized.)
   
4. Save the configuration from the current primary CMM to a file (the same configuration that you saved in step 2), and replace the current primary CMM. The current standby CMM automatically becomes the primary CMM. If necessary, apply the saved configuration to what is now the primary CMM.
   

Additional information

To find additional troubleshooting help, visit the "IBM Support & downloads" Web site. At "IBM Support Portal: Quick start" page, select Browse for "Choose your products", select your Chassis from PureFlex System under the Hardware list, and "Troubleshoot" for "Choose your page", then select "Continue" for "See your results". To narrow the results, search with keywords that are related to this article, such as "fail", "Chassis", etc. in the "Search support" field at the right panel.

To download the latest firmware or drivers, visit the "Fix Central" Web site, select "PureSystems" for "Product Group" (from the pull-down lists), select your product for "Product" (from the pull-down lists), select your product machine type for "Product" (from the pull-down lists), and select your operating system for "Operating system" (from the pull-down lists). You can refine the search by selecting the category of the download of your interest from the "Refine results" list.