To effectively utilize your network bandwidth, you can use traffic management and QoS (Quality of Service).
For example, you can configure an upload and download limit for the network, restrict the number of client associations, use band steering, and define QoS parameters. You can use one or more of these methods depending on the network traffic, the applications used on the SSID, and your device model.
Restrict Bandwidth for an SSID
To restrict the upload and download bandwidth on the SSID:
- Select the Restrict upload bandwidth on this SSID to check box and enter a data rate, from 0 to 1024 Kbps or Mbps, to restrict the upload bandwidth for the SSID.
- Select the Restrict download bandwidth on this SSID to check box and enter a data rate, from 0 to 1024 Kbps or Mbps, to restrict the download bandwidth for the SSID.
- Click Save.
Restrict Bandwidth Per User
You can also set restrictions for bandwidth usage on a per-user basis:
- Select Configuration > Device Configuration > SSID Profiles.
- On the Wi-Fi Profiles tab, add or edit a Wi-Fi profile.
- Expand the Traffic Shaping & QoS section.
- Select the Enable per User Bandwidth Control check box.
- 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 or Mbps.
- 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 or Mbps.
About RADIUS and User Bandwidth Settings
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 example, the Sales user group can be assigned upload and download bandwidth limits that differ from the upload and download limits assigned to the HR user group.
For clients who authenticate using a RADIUS server, you can configure the AP to retrieve and use the bandwidth control settings defined by the RADIUS server.
Based on the values returned by the RADIUS server, the AP dynamically sets the upload and download bandwidths for RADIUS-authenticated users. If the RADIUS server does not return a value for the bandwidth limit, the default upload and download bandwidth defined in the Traffic Shaping and QoS settings are used. If a user has more than one device, the bandwidth limit is applied separately on each device. This means that if a user uses two devices, and the bandwidth for the user or the user group is 4 Mbps, 4 Mbps is the bandwidth limit applied to each device.
User-specific bandwidth values can be defined in:
- A portal with an external RADIUS authentication server
- A GAMS portal
- The RADIUS server, if SSID is configured with 802.1x security
If bandwidth values are returned by more than one of the above-mentioned sources, the external RADIUS authentication server has the highest priority, followed by the GAMS portal, and then RADIUS server used with 802.1x authentication.
The default bandwidth value is used only if none of the other sources return a bandwidth value.
The RADIUS user attributes used to set per user bandwidth are vendor specific attributes-IETF ID :26. The vendor ID is 16901.
This table shows the mapping of the system attributes with the RADIUS attributes.
RADIUS Attribute ID
Per User Download Limit
Per User Upload Limit
Limit Clients Associating with the AP
To limit the number of clients associating with the AP:
- To specify the maximum number of clients that can associate with the AP, select the Limit number of associations check box.
- Specify the maximum number of client.
- Click Save.
Define Minimum and Maximum Unicast Data Rate
You can specify the minimum and maximum 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:
- Select the Minimum unicast data rate or Maximum unicast data rate check box as required.
- Specify the minimum data rate for communication.
- Click Save.
Define Multicast, Broadcast and Management Data Rate
You can specify the data rates for multicast, broadcast, and management data.
To specify a data rate:
- Select the Multicast, Broadcast and Management rate check box.
- Specify the data rate.
- Click Save.