Network Setup 4-141
4. To modify the properties of WMM Adoption Settings, select a radio and click the Edit button. For more
information, see Editing Access Port Adoption WMM Settings on page 4-141.
4.8.4.1 Editing Access Port Adoption WMM Settings
Use the Edit screen to modify a WMM profile's properties (AIFSN, Transmit Ops, Cw Min, and CW Max).
Modifying these properties may be necessary as Access Categories are changed and transmit intervals need
adjustment to compensate for larger data packets and contention windows.Use Configuring WMM on page
4-111 to configure downstream traffic parameters. WLAN WMM configuration affects your upstream traffic
parameters.
To edit the existing WMM settings:
1. Select Network Setup > Radio Adoption Defaults from the main menu tree.
2. Click the WMM tab.
3. Select a radio from the table and click the Edit button.
The AP Type identifies whether the radio is an 802.11b, 802.11bg and 802.11bgn or 802.11a and
802.11an radio. This value is read-only and cannot be modified. There are four editable access
categories: Video, Voice, Best Effort and Background.
4. Enter a number between 0 and 15 for the AIFSN value for the selected radio.
The AIFSN value is the current Arbitrary Inter-frame Space Number. Higher-priority traffic categories
should have lower AIFSNs than lower-priority traffic categories. This causes lower-priority traffic to wait
longer before trying to access the medium.
5. Enter a number between 0 and 65535 for the Transmit Ops value.
The Transmit Ops value is the maximum duration a device can transmit after obtaining a transmit
opportunity. For higher-priority traffic categories, this value should be set higher.
ECW Min The ECW Min is combined with the ECW Max to define the Contention Window.
From this range, a random number is selected for the back off mechanism. Lower
values are used for higher priority traffic.
ECW Max The ECW Max is combined with the ECW Min to make the Contention Window.
From this range, a random number is selected for the back off mechanism. Lower
values are used for higher priority traffic.
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