Wireless Controller and Service Platform System Reference Guide

Select the Advanced Settings tab.

Refer to the Radio Settings field to define or override how MAC service frames are aggregated by the access point radio.


A-MPDU Modes	Specify the A-MPDU mode. 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 this option is enabled, define a transmit limit, a 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 a support mode is enabled allowing A-MPDU frames to be received, define an advertised maximum limit for received A-MPDU aggregated frames. Options include 8191, 16383, 32767 and 65535 bytes. The default value is 65535 bytes.
Transmit Frame Size Limit	Use the spinner control to set a limit on transmitted A-MPDU aggregated frames. The available range is from 2000 to 65535 bytes. The default value is 2000 bytes.

Use the A-MSDU Modes drop-down menu in the Aggregate MAC Service Data Unit (A-MSDU) section to set or override the supported A-MSDU mode.

Available modes are Receive Only and Transmit and Receive. Use Transmit and Receive to send and receive frames up to 4 KB. The buffer limit is not configurable. The default value is Transmit and Receive.

Use the Airtime Fairness fields to optionally prioritize wireless access to devices.

Select Enable Fair Access to enable this feature and provide equal access client access to radio resources. Select Prefer High Throughput Clients 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.

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

This feature is supported only on the following access points: AP-7522, AP 7532, AP 7562, AP-8432, AP-8533.

Set or override the following Miscellaneous advanced radio settings:


RIFS Mode	Define an RIFS mode to determine whether interframe spacing is applied to access point transmissions or received packets, both, or neither The default mode is Transmit and Receive. Interframe spacing is an interval between two consecutive Ethernet frames to enable a brief recovery between packets and allow target devices to prepare for the reception of the next packet. Consider setting this value to None for high priority traffic to reduce packet delay.
STBC Mode	Select a STBC (space–time block coding) option to transmit multiple data stream copies across access point antennas to improve signal reliability. An access point‘s transmitted signal traverses a problematic environment, with scattering, reflection and refraction all prevalent. The signal can be further corrupted by noise at the receiver. Consequently, some of the received data copies are less corrupt and better than others. This redundancy means there‘s a greater chance of using one, or more, of the received copies to successfully decode the signal. STBC effectively combines all the signal copies to extract as much information from each as possible.
Transmit Beamforming	Enable beamforming to steer signals to peers in a specific direction to enhance signal strength and improve throughput among meshed devices (not clients). Each access point radio support up to 16 beamforming capable mesh peers. When enabled, a beamformer steers its wireless signals to its peers. A beamformee device assists the beamformer with channel estimation by providing a feedback matrix. The feedback matrix is a set of values sent by the beamformee to assist the beamformer in computing a steering matrix. A steering matrix is an additional set of values used to steer wireless signals at the beamformer so constructive signals arrive at the beamformee for better SNR and throughput. Any beamforming capable mesh peer connecting to a radio whose capacity is exhausted cannot enable beamforming itself. Transmit beamforming is available only on the AP-8163) model access point, and it is disabled by default.

Set or override the following Aeroscout Properties for the selected access point radio.


Forwarding Host	Specify the Aeroscout engine‘s IP address. When specified, the AP forwards Aeroscout beacons directly to the Aeroscout locationing engine without proxying through the controller or RF Domain manager. Note: Aeroscout beacon forwarding is supported only on theAP 6532, AP 7502, AP-7522, AP 7532, AP 7562, AP-8432, and AP-8533 model access points.
Forwarding Port	Set the port on which the Aeroscout engine is reachable.
MAC to be forwarded	Specify the MAC address to be forwarded.

Set or override the following Ekahau Properties for the selected access point radio.


Forwarding 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 Port	Set the Ekahau TZSP port used for processing information from locationing tags.
MAC to be forwarded	Specify the MAC address to be forwarded with location data requests.

Set or override the following Non-Unicast Traffic values for the profile‘s supported access point radio and its connected wireless clients:


Non-Unicast Transmit Rate	Use the Select drop-down menu to launch a sub-screen to define the data rate for broadcast and multicast frame transmissions. If you are not using the same rate for each BSSID, seven different rates are available – each with a separate menu.
Non-Unicast 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.

Refer to the Sniffer Redirect (Packet Capture) field to define or override the radio‘s captured packet configuration.


Host for Redirected Packets	If packets are redirected from a controller or service platform‘s connected access point radio, specify the IP address of a resource (additional host system) used to capture the redirected packets. This address is the numerical (non DNS) address of the host used to capture the redirected packets.
Channel to Capture Packets	Specify the channel used to capture redirected packets. The default value is channel 1.

Refer to the Channel Scanning field to define or override 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 toward the channel scan and does not negatively impact client support.
Off Channel Scan list for 5GHz	Select the list of channels for off-channel scans using the access point's 5GHz 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	Select the list of channels for off-channel scans using the access point's 2.4GHz 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 4.
Scan Interval	Set the interval (from 2 - 100 dtims) between off-channel scans. The default setting is 20 dtims.
Sniffer Redirect	Specify the IP address of the host to which captured off-channel scan packets are redirected.

If an AP 7161 access point is deployed, set an Extended Range (from 1 - 25 kilometers) to allow AP 7161 access points to transmit and receive with their clients at greater distances without being timed out.

Click OK to save the changes and overrides to the Advanced Settings screen.

Click Reset to revert to the last saved configuration.

Overriding Advanced Settings

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