The LiveUpdate policy is configured to prevent the download of a full definition file (full.zip) by Symantec Endpoint Protection (SEP) clients, but the network traffic shows that clients are still downloading this file from Symantec Endpoint Protection Manager (SEPM).
SEP 12.1 RU6
This issue is resolved in Symantec Endpoint Protection (SEP) 14. For more information on upgrading, please see Upgrade or migrate to Endpoint Protection 14