Brocade Communications Systems RFS6000 System Reference Manual page 204

4
Editing WMM Settings
Use the Edit screen to modify a WMM profile's properties (AIFSN, Tx Op, Cw Min, and CW Max).
Modifying these properties may be necessary as Access Categories are changed and transmit
intervals need to be adjusted to compensate for larger data packets and contention windows. Use
Configuring WMM on page 4-190 to configure downstream traffic parameters. WLAN WMM
configuration affects your upstream traffic parameters.
To edit existing WMM Settings:
1. Select Network > Access Port Radios from the main menu tree.
2. Click the WMM tab.
3. Select a radio from the table and click the Edit button to launch a screen displaying the WMM
4. Enter a number between 0 and 15 for the AIFSN value for the selected radio.
5. Enter a number between 0 and 65535 for the Transmit Ops value.
6. Enter a value between 0 and 15 for the Extended Contention Window minimum (ECW Min)
7.
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configuration for that 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 will cause
lower-priority traffic to wait longer before trying to access the medium.
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.
value.
The ECW Min is combined with the ECW Max 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 (video or voice) traffic.
Enter a value between 0 and 15 for the Extended Contention Window maximum (ECW Max)
value.
Brocade Mobility RFS4000, RFS6000, and RFS7000 System Reference Guide
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