Normal production environment experienced switch reload. No configuration or connection changes were being made. The switch recovered without intervention and traffic resumed.
Software Release: 2.1.1 Fixed in Version: 2.1.1c, 3.0.0a, 4.0.0
Freeing memory when it is successfully allocated. Under rare conditions the switch is allocating memory but not returning it to the pool. Repeated allocation lead to depletion of memory and kernel panic.
Upgrade to a version of code that contains the fix to get changes to prevent panic.