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When performing a distribution of the update, you can select a high or low priority. The priority aids in performance of the system. High priority updates distribute before low priority. Low priority updates are regulated to ensure the best performance of the system.
When you select a high priority, it takes precedent over a low priority update. However, during the update, you might have dropped packets as traffic and performance are hampered during the update. If you do not want this loss of packets, you can select a low priority.
From a device perspective, unless the traffic through the device is low (or in fallback mode), you should always do high priority updates from the SMS. Selecting low priority updates can take hours to perform a full update without a loss in traffic packets depending on the level of traffic.
To designate a distribution as high priority, select the High Priority check box on the Distribution dialog.