User's Guide

AirTight Management Console Configuration
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Large enterprises, sometimes, use RADIUS attributes to propagate network policies across multiple
points of access. Users are divided into groups, and policies are applied to each group to effectively
control access to network resources. Each user group is assigned an upload bandwidth and a download
bandwidth, based on the need of that user group. For instance, the Sales user group would be assigned
upload and download bandwidths that differ from the upload and download bandwidths assigned to the
HR user group.
In case of clients authenticated using a RADIUS server, you can configure the AirTight AP to retrieve and
use the bandwidth control settings defined by the RADIUS server. The unit for bandwidth is Kbps.
Based on the values returned by the RADIUS server, the AirTight AP dynamically sets the upload and
download bandwidths for the RADIUS-authenticated user. If the RADIUS server does not return a value
for the bandwidths, the default upload and download bandwidth defined in the Traffic Shaping and QoS
settings are used. If a user has more than one devices, the bandwidth limit is applied separately on each
of these devices. This means that if a user uses 2 devices, and the bandwidth for the user or the user
group is 4 Mbps, 4 Mbps is the bandwidth limit applied to each of these devices.
User-specific bandwidth values can come from one or more of the following.
•
From portal with external RADIUS authentication server.
•
From GAMS portal.
•
From the RADIUS server, if SSID is configured with 802.1x security.
•
From AirTight server- If no value is returned by either of the above, the default value defined by
AirTight server is used.
If bandwidth values are returned by more than one of the above-mentioned sources, the order of
precedence to identify the bandwidth limit to apply is the same as mentioned above. That is, external
RADIUS authentication server has the highest priority followed by GAMS portal, and then RADIUS server
used for 802.1x authentication.
The default AirTight server bandwidth value is used only if none of the other sources return a bandwidth
value.
To enable RADIUS-based assignment of bandwidth based on the user group of the RADIUS user, do the
following.
1.
Navigate to Configuration>Device Configuration>SSID Profile.
2.
On the Wi-Fi profile tab, add or edit a Wi-Fi profile.
3.
Click Traffic Shaping & QoS. The section expands.
4.
Select the Enable per User Traffic Control check box. The fields for Restrict user upload
bandwidth to and Restrict client down load bandwidth to appear.
5.
To specify a default bandwidth value for upload bandwidth, select the check box for Restrict user
upload bandwidth to and specify a value between 0 and 1024 Kbps. This is used when no upload
bandwidth is returned by the RADIUS server for the RADIUS user.
6.
To specify a default bandwidth value for download bandwidth, select the check box for Restrict user
download bandwidth to and specify a value between 0 and 1024 Kbps. This is used when no
download bandwidth is returned by the RADIUS server for the RADIUS user.
The RADIUS user attributes used to set per user bandwidth fall under vendor specific attributes-IETF ID
:26. The vendor ID for AirTight is 16901.
The following table shows the mapping of the AirTight attributes with the RADIUS attributes.
AirTight attribute
RADIUS attribute ID
AirTight Per User Download Limit
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