Installation guide

Network Setup 4-139
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 4-139.
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
4-110 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 802.11a radio or an 802.11 bg 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.
6. Enter a value between 0 and 15 for the Contention Window minimum value.
The CW Minimum is combined with the CW Maximum 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.
7. Enter a value between 0 and 15 for the Contention Window maximum value.
The CW Maximum is combined with the CW Minimum 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.
8. Refer to the Status field for the current state of the requests made from applet. This field displays error
messages if something goes wrong in the transaction between the applet and the switch.
9. Click OK to use the changes to the running configuration and close the dialog.
10.Click Cancel to close the dialog without committing updates to the running configuration.
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.