Dscp Decimal Value WMM Access Category

Ensure that WMM is enabled for legacy APs for the mapping to take effect. For 802.11n APs, ensure that either WMM or high throughput is enabled.

DSCP classifies packets based on network policies and rules, not priority. The configured DSCP value defines per hop behaviors (PHBs). The PHB is a 6-bit value added to the 8-bit Differentiated Services (DS) field of the IP packet header. The PHB defines the policy and service applied to a packet when traversing the network. You configure these services in accordance with your network policies. Table 301 shows the default WMM AC to DSCP decimal mappings and the recommended WMM AC to DSCP mappings.

Table 301: WMM Access Category to DSCP Mappings

DSCP Decimal Value

WMM Access Category

Background

Best effort

Video

Voice

By customizing WMM AC mappings, both the controller and AP maintain a customized WMM AC mapping table for each configured SSID profile. All packets received are matched against the entries in the mapping table and prioritized accordingly. The mapping table contains information for upstream (client to AP) and downstream (AP to client) traffic.

NOTE: In earlier releases, the default mappings exist for all SSIDs. After you customize a WMM AC mapping and apply it to the SSID, the controller overwrites the default mapping values and uses the configured values . If a controller is upgraded to 6.2 from an older version, the default as well as the user configured WMM-DSCP mappings in the existing SSID profiles are retained. There are no default mappings for a newly created SSID profile and for a factory default controller running 6.2 image.

When planning your mappings, make sure that any immediate switch or router does not have conflicting 802.1p or DSCP configurations/mappings. If this occurs, your traffic may not be prioritized correctly.

To view the mapping settings, use the following command:

show wlan ssid-profile <profile>

Using the WebUI to map between WMM AC and DSCP

1.Navigate to the Configuration > Wireless > AP Configuration page.

2.Select either the AP Group or AP Specific tab. Click Edit for the AP group or AP name.

3.In the Profiles list, select Wireless LAN. Select Virtual AP, then select the applicable virtual AP profile. Select the SSID profile.

4.In the Profile Details, select the Advanced tab.

5.Scroll down to the Wireless Multimedia (WMM) option. Select (check) this option.

6.Modify the DSCP mapping settings, as needed:

Dell PowerConnect W-Series ArubaOS 6.2 User Guide

Voice and Video 698

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Dell 6.2 Dscp Decimal Value WMM Access Category, Using the WebUI to map between WMM AC and Dscp

Models: 6.2