Manage Advanced Radio Settings

About this task

A radio's profile configuration is customizable to define how transmit and receive data frames are processed. A radio's sniffer redirect settings can be refined to adjust how captured packets are directed. Additionally, channel scanning settings can refined in respect to channel scanning requirements on either the 2.4 or 5 GHz radio bands.

To set or edit the selected radio's advanced settings:

Procedure

  1. Select the Advanced Settings tab.
    Click to expand in new window
    Access Point - Radio Interface - Advanced Settings Screen
  2. Refer to the Radio Settings field to define how MAC service frames are aggregated by the access point radio.
    A-MPDU Modes Use the drop-down menu to define the A-MPDU mode supported. Options include Transmit Only, Receive Only, Transmit and Receive and None. The default value is Transmit and Receive. Using the default value, long frames can be both sent and received (up to 64 KB). When enabled, define either a transmit or receive limit (or both).
    Minimum Gap Between Frames Use the drop-down menu to define, in microseconds, the minimum gap between consecutive A-MPDU frames. The options include:
    • 0 – Configures the minimum gap as 0 microseconds
    • 1 – Configures the minimum gap as 1 microseconds
    • 2 – Configures the minimum gap as 2 microseconds
    • 4 – Configures the minimum gap as 4 microseconds
    • 8 – Configures the minimum gap as 8 microseconds
    • 16 – Configures the minimum gap as 16 microseconds
    • auto – Auto configures the minimum gap depending on the platform and radio type (default setting)
    Received Frame Size Limit If the A-MPDU mode is set to Receive Only or Transmit and Receive, use this option to define an advertised maximum limit for received A-MPDU aggregated frame size. The options include:
    • 8191 - Advertises the maximum received frame size limit as 8191 bytes.
    • 16383 - Advertises the maximum received frame size limit as 16383 bytes.
    • 32767 - Advertises the maximum received frame size limit as 32767 bytes.
    • 65535 - Advertises the maximum received frame size limit as 65535 bytes.
    • 128000 - Advertises the maximum received frame size limit as 128000 bytes.
    • 256000 - Advertises the maximum received frame size limit as 256000 bytes.
    • 512000 - Advertises the maximum received frame size limit as 512000 bytes.
    • 1024000 - Advertises the maximum received frame size limit as 1024000 bytes.
    • default - This option auto configures the maximum received frame size based on the platform and radio type. This is the default setting.
    Transmit Frame Size Limit If the A-MPDU mode is set to Transmit Only or Transmit and Receive, use the spinner control to set limit on transmitted A-MPDU aggregated frame size.

    The range depends on the AP type and the radio selected.

    For 802.11ac capable APs, the range is as follows:
    • 2000 - 65,535 bytes - For radio 1, the range is 2000 - 65,535 bytes. The default value is 65,535 bytes.
      Note: The WiNG AP7662 and AP7632 access points are an exception to the above rule. For the AP7662 and AP7632 access point models, the radio 1 range is 2000 - 1,024,000 bytes. And the default value is 1,024,000 bytes.
    • 2000 - 1,024,000 bytes - For radio 2, the range is 2000 - 1,024,000 bytes. The default value is 1,024,000 bytes.
    Note: The WiNG 802.11ac capable APs are: AP7522, AP7532, AP7562, AP7602, AP7612, AP7632, AP7662, AP8432, and AP8533.
    For non 802.11ac capable APs the range is as follows:
    • 2000 - 65,535 bytes - For both radio 1 and radio 2 the range is 2000 - 65,535 bytes. The default value is 65,535 bytes.
  3. In the Aggregate MAC Service Data Unit (A-MSDU) section , use the A-MSDU Modes drop-down menu to set the supported A-MSDU mode.
    Available modes include Receive Only and Transmit and Receive. Transmit and Receive is the default value. Using Transmit and Receive, frames up to 4 KB can be sent and received. The buffer limit is not configurable.
  4. Use the Airtime Fairness fields to optionally prioritize wireless access to devices.
    Enable Fair Access Select this option to enable this feature and provide equal access client access to radio resources.
    Prefer High Throughput Clients Select this option to prioritize clients with higher throughput (802.11n clients) over clients with slower throughput (802.11 a/ b/g) clients. Use the spinner control to set a weight for the higher throughput clients.
  5. Use the Rx Sensitivity Reduction drop-down menu to set the selected radio's receive sensitivity reduction threshold level.

    This threshold determines the RSSI (in dBm) at which the radio acknowledges the SOP (Start of Packet) frames received from the client, and begins to demodulate and decode the packets.

    In highly dense environments, or single-channel networks, having two or more radios sharing a channel, CCI (co-channel interference) adversely impacts network performance. By setting this threshold, you can control the radio‘s receive sensitivity to interference and noise, thereby reducing the impact of CCI. You are basically configuring the AP to not decode packets that have a signal strength below the specified threshold level.

    The available rx-sensitivity-reduction threshold levels are: High, Low, Medium and None. Set the threshold level as High, to force your radio to ignore all traffic having a signal strength below the high threshold level value. This results in fewer traffic interruptions due to collision and Wi-Fi interference. Note, the default setting is None.

    The following table provides the rx-sensitivity-reduction threshold level to RSSI mapping for the 2.4 GHz and 5 GHz bands:
    802.11 Bands High Threshold Medium Threshold Low Threshold
    2.4 GHz -79 dBm -82 dBm -85 dBm
    5 GHz -76 dBm -78 dBm -80 dBm
    Note

    Note

    This feature is supported only on the following access points: AP7522, AP7532, AP7562, AP8432, AP8533.
  6. Set the following Aeroscout Properties:
    Forward Select enable to forward Aeroscout packets to a specified MAC address. Aeroscout tags associate with an access point, then communicate with a location engine. This setting is disabled by default.
    MAC to be Forwarded Specify the MAC address to be forwarded.
  7. Set the following Ekahau Properties:
    Forward Host Specify the Ekahau engine IP address. Using Ekahau small, battery powered Wi-Fi tags are attached to tracked assets or carried by people. Ekahau processes locations, rules, messages and environmental data and turns the information into locationing maps, alerts and reports.
    Forwarding Host Use the spinner control to set the Ekahau TZSP port used for processing information from locationing tags.
    MAC to be Forwarded Specify the MAC address to be forwarded.
  8. Set the following Non-Unicast Traffic values for the profile's supported access point radio and its connected wireless clients:
    Broadcast/Multicast Transmit Rate Use the drop-down menu to define the data rate broadcast and multicast frames are transmitted. Seven different rates are available if the not using the same rate for each BSSID, each with a separate menu.
    Broadcast/Multicast Forwarding Define whether client broadcast and multicast packets should always follow DTIM, or only follow DTIM when using Power Save Aware mode. The default setting is Follow DTIM.
  9. Refer to the Sniffer Redirect (Packet Capture) field to define the radio's captured packet configuration.
    Host for Redirected Packets If packets are re-directed from a connected access point radio, define an IP address resource (additional host system) to capture the re-directed packets. This address is the numerical (non DNS) address of the host used to capture re-directed packets.
    Channel to Capture Packets Use the drop-down menu to specify the specific channel used to capture re-directed packets. The default value is channel 1.
  10. Refer to the Channel Scanning field to define the radio‘s captured packet configuration.
    Enable Off Channel Scan Enable this option to scan across all channels using this radio. Channel scans use access point resources and can be time consuming, so only enable when your sure the radio can afford the bandwidth be directed towards to the channel scan and does not negatively impact client support.
    Off Channel Scan list for 5GHz Define a list of channels for off channel scans using the 5GHz access point radio. Restricting off channel scans to specific channels frees bandwidth otherwise utilized for scanning across all the channels in the 5GHz radio band.
    Off Channel Scan list for 2.4GHz Define a list of channels for off channel scans using the 2.4GHz access point radio. Restricting off channel scans to specific channels frees bandwidth otherwise utilized for scanning across all the channels in the 2.4GHz radio band.
    Max Multicast Set the maximum number (from 0 - 100) of multicast/broadcast messages used to perform off channel scanning. The default setting is four.
    Scan Interval Set the interval (from 2 - 100 dtims) off channel scans occur. The default setting is 20dtims.
    Sniffer Redirect Specify the IP address of the host to which captured off channel scan packets are redirected.
  11. Select OK to save the changes.
    Select Reset to revert to the last saved configuration.
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