User's Guide

AirTight Management Console User Guide
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AirTight Per User Upload Limit
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Limit Clients associating with the AP
You can limit the number of clients associating with the AP to restrict the network bandwidth.
To limit the number of clients associating with the AP, do the following.
1.
Select the Limit number of associations check box if you want to specify the maximum number of
clients that can associate with the AP.
2.
Specify the maximum number of clients in the field next to the Limit number of associations check
box.
3.
Click Save to save the changes.
Define Minimum Data Rate
You can specify the minimum data rate for the AP-client communication. Data rates greater than the
specified data rate are used to communicate with clients.
To specify a minimum data rate, do the following.
1.
Select the Minimum data rate check box.
2.
Specify the minimum data rate for communication in the field adjacent to the Minimum data rate
check box.
3.
Click Save to save the changes.
Quality of Service (QoS)
The priority of various types of traffic is defined in QoS. QoS stands for quality of service. The service
guarantee is imperative in case of streaming multimedia applications, for example, voice over IP, video,
online games etc. It is necessary to define the priority when the network bandwidth is shared for such
applications. You must define the QoS parameters if you are using the SSID for such applications. QoS
ensures that applications or traffic requiring higher priority gets the required priority. The service
guarantee for the service being provided is met by allocating adequate bandwidth based on the QoS
priority.
If you configure the radio in 11N mode, WMM (Wi-Fi multimedia) will always be enabled, because WMM
is mandatory in 11N mode.
In 11N mode, if the QoS check box is not selected, the system uses the default QoS parameters.
The default QoS settings are as follows.
o SSID priority is voice.
o Priority type is ceiling.
o Downstream marking is DSCP.
o Upstream marking is enabled and the value is 802.1p marking.
The system uses the user-configured QoS settings if the QoS check box is selected.
To configure QoS settings, do the following.
1.
Select the QoS check box and define your own QoS settings for Wi-Fi multimedia on the SSID profile.
2.
Specify voice, video, best effort or background as the SSID Priority depending on your requirement.
3.
Select Priority Type as Fixed if all traffic of this SSID has to be transmitted at the selected priority
irrespective of the priority indicated in the 802.1p or IP header. Select Priority Type as Ceiling if
traffic of this SSID can be transmitted at priorities equal to or lower than the selected priority.
4.
Select the Downstream mapping option if Priority Type is selected as Ceiling. The priority is
extracted from the selected field (802.1p, DSCP or TOS) and mapped to the wireless access
category for the downstream traffic subject to a maximum of the selected SSID Priority. For the
downstream mappings, the mapping depends on the first 3 bits (Class selector) of the DSCP value,