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Cisco Bug: CSCur24099 - Module ejector handling incorrect - can report false open or close

Last Modified

May 17, 2020

Products (1)

  • Cisco Nexus 7000 Series Switches

Known Affected Releases

5.2(9)S71 6.2(3)

Description (partial)

Symptom:
This is a feature enhancement to improve the handling of ejector open/close events. Open events of both top and bottom ejectors (On Fabric or Interface modules) will trigger the card to power down in preparation to be removed from the system.

The following error message will be seen in the log:

%PLATFORM-3-EJECTOR_STAT_CHANGED: Ejectors' status in slot <slot #> has changed, Top Ejector is CLOSE, Bottom Ejector is OPEN
%PLATFORM-3-EJECTOR_STAT_CHANGED: Ejectors' status in slot <slot #> has changed, Top Ejector is OPEN, Bottom Ejector is OPEN

Conditions:
It is possible under certain conditions (excessive noise and/or interference) that ejector signals can be falsely interpreted. This can lead to ejectors being declared as open when in fact they are closed. It's also possible to see ejector open/close messages for slots without cards. 

If all Fabric modules see such a problem at the same time and power down, this will in turn trigger all Interface Module to also power down. 

The system will recover by itself and once the ejectors close again the module(s) will be powered back on.
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