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Cisco IOS Software Configuration Guide for Cisco Aironet Access Points
OL-30644-01
Chapter 6 Configuring Radio Settings
Configuring VoIP Packet Handling
The Stream page appears.
Step 4 Click the tab for the radio to configure.
Step 5 For both CoS 5 (Video) and CoS 6 (Voice) user priorities, choose Low Latency from the Packet Handling
drop-down list and enter a value for maximum retries for packet discard in the corresponding field.
Packets in other queues are dequeued, giving delay-sensitive data preferential treatment over other
traffic.
The default value for maximum retries is 3 for the Low Latency setting (Figure 6-2). This value indicates
how many times the access point will try to resend a lost packet before discarding it.
Note You may also configure the CoS 4 (Controlled Load) user priority and its maximum retries value.
Step 6 Click Apply.
Figure 6-2 Packet Handling Configuration
You can also configure VoIP packet handling using the CLI. For a list of Cisco IOS commands for
configuring VoIP packet handling using the CLI, consult the Cisco IOS Command Reference for Cisco
Aironet Access Points and Bridges.
Once you have defined the retry level, you can also configure the speed at which those frames should be
sent. This is done at the bottom of the page, in the Low Latency Packet Rates section. You can set each
rate to:
• Nominal—The AP will try to use this rate to send the Low Latency Packets (using the faster rate
first, and of course depending on the client signal level).
• Non-nominal—The AP will try not to use that rate, but will revert to it if no nominal rate is possible.
• Disabled—The AP will not try to use that rate.
From the CLI, use radio interface config commands as follows (The CLI commands offer more options
than the GUI page):
packet max-retries number 1 number 2 fail-threshold number 3 number 4 priority value drop-packet