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Cisco Bug: CSCtb00005 - LCs remain in a inconsistent state even after system switchover

Last Modified

Feb 22, 2014

Products (1)

  • Cisco MDS 9000 Series Multilayer Switches

Known Affected Releases

4.1(1b)

Description (partial)

Symptom:
In 4.1 releases, if there were 3 Supervisor switchovers within a 20 min period, a EEM policy powered down all modules in the chassis. This EEM policy was applied to user-triggered switchovers as well in some conditions. The internal API that was used to power down all modules did not sync the module state properly to the standby Sup. So, the standby Sup ended up with a non-terminal/dead-end state for the module that prevented subsequent state updates as well. Even after the module was reloaded following a Supervisor switchover, the module did not go to a "terminal" state and a subsequent Supervisor switchover would result in a module reload again. 

Conditions:
In 4.1(1b), from element manager if the user initiates 3 supervisor switchovers in a 20-minute period, EEM policy in the "system manager" service would power down all modules in the system. 

Workaround(s):
Only way to recover from this state is to remove and reseat the linecard.

EEM policy in system manager that the triggers this issue no longer exists in 4.1(3a).  Fix for this issue in "platform manager" service has been checked into 4.1.3a sw-release and beyond.
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