Determines whether QoS Agent User Based Policy (UBP) support is enabled and, if so, what level of support is enabled. Setting the value of this attribute to 'ubpSupportDisabled(1)' will cause user information forwarded by other applications (e.g., EAP) to be ignored by the QoS Agent. A value of 'ubpSupportHighSecurityLocalData(2)' or 'ubpSupportLowSecurityLocalData(3)' will cause the internal QoS Agent database to be searched for user-specific classification data when user information is forwarded by other applications. When a high level of security is requested, user- specific classification data that is found must be successfully installed before a user is given access to the switch. A low level of security means that a user will be given access to the switch even if the resources to install user- specific classification data are not currently available. Lastly, a value of 'ubpSupportEPMData(4)' will cause notifications to be generated for Enterprise Policy Manager (EPM) consumption based on user information forwarded by other applications. Notifications will be generated for events of interest to EPM, such as user addition/deletion that is associated with User Based Policy (UBP) support. Notifications will not be generated otherwise. Note that the information that is necessary to construct and transmit a notification must also be configured for this value to be useful. Changing the value of this attribute will cause UBP data currently in-use to be lost.