Extreme Networks Altitude 4700 Series Product Reference Manual page 181

Set RF QoS
Set Aggregation
Altitude 4700 Series Access Point Product Reference Guide
Click the Set RF QoS button to display the Set RF QOS
screen to set QoS parameters for the radio. Do not
confuse with the QoS configuration screen used for a
WLAN. The Set RF QoS screen initially appears with
default values displayed.
Select manual from the Select Parameter set drop-down
menu to edit the CW min and CW max (contention
window), AIFSN (Arbitrary Inter-Frame Space Number)
and TXOPs Time for each Access Category. These are
the QoS policies for the 802.11a/n or 802.11b/g/n radio,
not the QoS policies configured for the WLAN (as created
or edited from the Quality of Service Configuration screen).
Extreme Networks recommends only advanced users
manually set these values. If the type of data-traffic is
known, use the drop-down menu to select an option
representative of the intended radio band support. Wifi
represents multimedia traffic, default is typical data traffic
and voice is for "Voice-Over-IP" supported wireless
devices.
Click OK to implement the selected QoS values and return
to the 802.11a/n or 802.11b/g/n radio configuration screen.
Clicking Cancel reverts the screen to the last saved
configuration.
Select the Enable Transmit A-MSDU checkbox (within the
A-MSDU Aggregation field) to enable the aggregation of
MAC Service frames. When enabled, long frames can be
both sent and received (up to 4 KB). The A-MSDU buffer
limit is not user configurable. If disabled, no AMSDU
packets are transmitted by the Access Point.
Select the Enable Transmit A-MPDU checkbox (within the
A-MPDU Aggregation field) to allow the aggregation of
MAC Protocol frames. When enabled, long frames can be
both sent and received (up to 64 KB). When enabled,
define an A-MPDU Transmit Size Limit (default is 2 bytes),
A-MPDU Receive Size Limit (default is 65535 bytes) and
an A-MPDU Minimum Spacing Time (default is 0 usec).
Set these values as appropriate to broadcast the maximum
length A-MPDU transmit and receive intervals that can be
used.
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