> # About Zone-Based Traffic Priority

> The zoning feature provides an additional segregation method to prioritize select zones in a fabric and set up access control between devices. Using this feature, you can configure the quality of service (QoS) priority as a zone attribute. You can assign the QoS traffic priority attribute to be high, medium, or low. By default, zones with no specified priority are implicitly assigned a low priority. Refer to the Cisco MDS 9000 NX-OS Family Quality of Service Configuration Guide for more information.

> To use this feature, you need to obtain the ENTERPRISE_PKG license (refer to the Cisco NX-OS Family Licensing Guide) and you must enable QoS in the switch (refer to the Cisco MDS 9000 Family NX-OS Quality of Service Configuration Guide).

> This feature allows SAN administrators to configure QoS using a familiar data flow identification paradigm. You can configure this attribute on a zone-wide basis rather than between zone members.

> Caution | If zone-based QoS is implemented in a switch, you cannot configure the interop mode in that VSAN.

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