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Wireless & Mobility · Advanced

Differentiated Services Code Point Mapping

Translating Layer 3 DSCP markings to 802.11 user priorities and back, for end-to-end wireless QoS.

Definition

RFC 8325 provides guidance for mapping DSCP to UP, such as EF (46) to UP 6 and AF41 (34) to UP 5. WLCs and APs use mappings for downstream frames and trust or remark upstream traffic. Consistent mapping is essential for voice quality.

Example

DSCP EF 46 maps to UP 6 (AC_VO).

Exam tip

RFC 8325 is the reference for DSCP-to-UP mapping.

Related terms