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[MX] Intermittent messages seen: 'Offlined by button press'

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Article ID: KB36091 KB Last Updated: 08 Sep 2020Version: 1.0
Summary:

Sometimes MX960 may encounter a chassisd message related to "Offlined by button press" for a FPC. The FPC status shows as State: Offline and Reason: Offlined by button press.

Jun 18 16:35:43 mx960 chassisd[1718]: CHASSISD_FRU_OFFLINE_NOTICE: Taking FPC 2 offline: Offlined by button press

Slot 2 information:
State                                 Offline
Reason:                               Offlined by button press
Temperature                        24
Total CPU DRAM                      0 MB
Total RLDRAM                      662 MB
Total DDR DRAM                   3072 MB
Max Power Consumption             348 Watts

However, in field observation is that the lights are green and no one performed a manual button press.

Solution:

In MX960, there is a FPM board that has separate offline/online buttons for each FPC slot. For details, refer to the documentation on MX960 Craft Interface Overview.

  1. First, check if the affected FPC was also rebooted when the above event occurred. Check if the "Offlined by button press" reoccurs by itself without any intervention. Monitor for 24-48 hours to see if it's a transient issue.

  2. If the issue reoccurs, it is recommended to replace the FPM panel (also known as craft-interface) and recheck FPC and FPM status. This step usually addresses the faulty connection, which triggers the button press event to reboot FPC.

    Monitor after FRU replacement. Without replacing the FPM, such intermittent FPC reboot may reoccur.

  3. After FRU replacement, monitor FPM and FPC health for 24-48 hours. If step 2 still does not resolve, please contact JTAC for further assistance.

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