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DSCP Mapping

Wi-Fi Multimedia (WMM) and Differentiated Service Code Point (DSCP) mapping in Juniper Mist.

QoS Priorities

The WMM standard defines voice, video, best effort, and background access categories that can be given different performance priorities on the wireless network. To be effective, these priorities must also align with the QoS traffic prioritization scheme configured for the wired network. For traffic from the Mist AP to the client, Mist uses the default mappings shown in Table 1.

Table 1: DSCP to AC Mapping
DSCP Value Access Category
DSCP 0 through DSCP 31 AC 1
DSCP 32 through DSCP 47 AC 2
DSCP 48 through DSCP 60 AC 3

Alternatively, you can configure QoS priority for traffic from the Mist AP to clients. Figure 1 shows how you would set a given WLAN to have all downstream client traffic use the Voice access class, and thereby override the default DSCP value.

Do this from the WLAN configuration page: click Site > WLANs and then select the wlan you want to configure.

Figure 1: QoS Priorities QoS Priorities