An engineer configures QoS on an AireOS WLC v8.5. The engineer configures a WLAN for voice traffic and must give a higher priority to WMM clients than to non-WMM clients. Which two configurations…

The Gold QoS profile maps to AC_VI (video access category) with a lower DSCP marking than Platinum/EF, making it insufficient for voice traffic that requires the highest available priority class.

Multicast Default Priority governs QoS markings applied to multicast streams on the WLAN and has no effect on unicast voice traffic priority for WMM or non-WMM clients.

Setting Unicast Default Priority to Platinum assigns the highest DSCP markings to unicast traffic from non-WMM clients that cannot signal their own QoS class. WMM clients that explicitly signal AC_VO (voice access category) receive additional EDCA queue optimization on top of the Platinum marking, which gives WMM clients inherently higher effective priority even when both client types are assigned Platinum-level DSCP.

Selecting Video from the Unicast Default Priority drop-down assigns the AC_VI video class to non-WMM traffic, which is a lower priority than the Platinum/voice level needed and would not satisfy the requirement to treat non-WMM clients at voice priority.

The Platinum QoS profile is the highest-tier profile in AireOS WLC and is purpose-built for voice traffic - it enables AC_VO WMM access category, sets the DSCP value to EF (46), and applies the corresponding EDCA parameters required to prioritize voice end-to-end across the wireless and wired infrastructure.