Specifications

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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
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Chapter 14 Configuring QoS
Configuring QoS
Step 19 Click the Apply button at the bottom of the page to apply the policies to the access point ports.
Step 20 If you want the access point to give priority to all voice packets regardless of VLAN, click the Advanced
tab. Figure 14-3 shows the QoS Policies - Advanced page.
Figure 14-3 QoS Policies - Advanced Page
Select Enable and click Apply to give top priority to all voice packets.
Note When you enable QoS Element for Wireless Phones, the access point gives top priority to voice
packets even if you do not enable QoS. This setting operates independently from the QoS
policies that you configure.
Adjusting Radio Access Categories
The access point uses the radio access categories to calculate backoff times for each packet. As a rule,
high-priority packets have short backoff times.
The default values in the Min and Max Contention Window fields and in the Slot Time fields are based
on settings recommended in IEEE Draft Standard 802.11e. For detailed information on these values,
consult that standard.
We strongly recommend that you use the default settings on the Radio Access Categories page. Changing
these values can lead to unexpected blockages of traffic on your wireless LAN, and the blockages might
be difficult to diagnose. If you change these values and find that you need to reset them to defaults, use
the default settings listed in Table 14-2.