Applies to Cluster switch Answer NetApp does not recommend using different OS versions for redundant cluster switches. Using different OS versions can lead to unpredictable issues over time. It is pos...Applies to Cluster switch Answer NetApp does not recommend using different OS versions for redundant cluster switches. Using different OS versions can lead to unpredictable issues over time. It is possible to connect the cluster switches first and then upgrade them to the same OS version . Additional Information additionalInformation_text