You can configure ARM features such as band steering, spectrum load balancing, and airtime fairness mode either using Instant UI or CLI.
In the Instant UI
To configure ARM:
1. Click the RF link at the top right corner of the Instant main window.
2. Click Show advanced options. The ARM tab details are displayed.
Figure 64 RF Window - ARM Tab
3. Configure the following parameters for Band steering mode:
Parameter Description
Prefer 5 GHz Select this option to use band steering in 5 GHz mode. On selecting this, the IAP steers the client to 5 GHz band (if the client is 5 GHz capable), but allows the client connection on the 2.4 GHz band if the client persistently attempts for 2.4 GHz association.
Force 5 GHz Select this option to enforce 5 GHz band steering mode on the IAPs.
Balance Bands Select this option is selected, the IAP tries to balance the clients across the two radios to best utilize the available 2.4 GHz bandwidth. This feature takes into account the fact that the 5 GHz band has more channels than the 2.4 GHz band, and that the 5 GHz channels operate in 40MHz while the 2.5 GHz band operates in 20MHz.
Disabled Select this option if you want to allow the clients to select the band to use.
Table 34:Band Steering Mode - Configuration Parameters
4. For Airtime fairness mode, specify any of the following values:
Parameter Description
Default Access Select this option to provide access based on client requests. When Air Time Fairness is set to default access, per user and per SSID bandwidth limits are not enforced.
Fair Access Select this option to allocate Airtime evenly across all the clients.
Preferred Access Select this option to set a preference where 11n clients are assigned more airtime than 11a/11g. The 11a/11g clients get more airtime than 11b. The ratio is 16:4:1.
Table 35:Airtime Fairness Mode - Configuration Parameters
5. For Spectrum load balancing, specify the following parameters:
Parameter Description Spectrum load
balancing
Select Enabled to enable Spectrum load balancing on APs so that clients are assigned to less loaded channels. When enabled, the Virtual Controller compares whether an AP has more clients than its neighboring APs on other channels. When the client load for an AP reaches or exceeds the threshold specified for SLB
threshold, load balancing is enabled on the AP. For more information, seeSpectrum Load Balancing on page 185.
SLB calculating interval
The value specified for SLB calculating interval determines how often spectrum load balancing must be calculated. The interval is specified in seconds and the default value is 30 seconds. You can specify a value within the range of 10-600.
SLB neighbor matching %
The value specified for SLB neighbor matching % indicates the percentage for comparing client density of AP neighbors to determine the client load on a specific AP channel. You can specify a percentage value within the range of 20-100. The default value is 75%.
SLB threshold The value specified for SLB threshold indicates the number of clients on a channel.
When the client load for an AP reaches or exceeds the specified threshold, load balancing is enabled on the AP. You can specify a value within range of 1-20. The default value is 2.
Table 36:Spectrum Load Balancing - Configuration Parameters
6. For Access Point Control, specify the following parameters:
Parameter Description Customize Valid
Channels
Select this check box to customize valid channels for 2,4 GHz and 5 GHz. By default, the AP uses valid channels as defined by the Country Code (regulatory domain). On selecting the Customize Valid Channels check box, a list of valid channels for both 2.4.GHz and 5 GHz are displayed. The valid channel customization feature is disabled by default.
Minimum Trans-mit Power
Specify the minimum transmission power. The value specified for Minimum Transmit Power indicates the minimum Effective Isotropic Radiated Power (EIRP) from 3 to 33 dBm in 3 dBm increments. If the minimum transmission EIRP setting configured on an AP is not supported by the AP model, this value is reduced to the highest
supported power setting. The default value is for minimum transmit power is 18 dBm.
Maximum Trans-mit Power
Specify the maximum transmission power. The value specified for Maximum Transmit Power indicates the maximum Effective Isotropic Radiated Power (EIRP) from 3 to 33 dBm in 3 dBm increments. If the maximum transmission EIRP configured on an AP is not supported by the AP model, the value is reduced to the highest supported power setting. The default value for maximum transmit power is 127 dBm.
Client aware Select Enabled to allow ARM to control channel assignments for the APs with active clients. When the Client aware mode is set to Disabled, the IAP may change to a more optimal channel, which change may disrupt current client traffic. The Client aware option is Enabled by default.
Scanning Select Enabled so that the IAP dynamically scans all 802.11 channels within its 802.11 regulatory domain at regular intervals and reports to the IAP. This scanning report includes WLAN coverage, interference, and intrusion detection data.
Wide Channel Bands
Select a band to allow to place APs in 40Mhz (wide band) channels. The Wide channel band allows administrators to configure 40 MHz channels in the 2.4 GHz and 5.0 GHz bands. 40 MHz channels are two 20 MHz adjacent channels that are bonded together. 40 MHz channel effectively doubles the frequency bandwidth available for data transmission.
For high performance, you can select 5GHz. If the AP density is low, enable in the 2.4GHz band.
Table 37:Access Point Control - Configuration Parameters
7. Reboot the IAP.
8. Click OK.
In the CLI
To configure ARM features:
(Instant Access Point)(config)# arm
(Instant Access Point)(ARM)# a-channels <5GHz-channels>
(Instant Access Point)(ARM)# g-channels <2.4GHz-channels>
(Instant Access Point)(ARM)# min-tx-power <power>
(Instant Access Point)(ARM)# max-tx-power <power>
(Instant Access Point)(ARM)# band-steering-mode {<Prefer 5 GHz>| <Force 5 GHz>|<Balance Bands>|<Disabled>}
(Instant Access Point)(ARM)# air-time-fairness-mode {<Default Access>| <Fair Access> |
<Preferred Access>}
(Instant Access Point)(ARM)# client-aware
(Instant Access Point)(ARM)# wide-bands {<5GHz>|<2GHz>|<All>|<None>}
(Instant Access Point)(ARM)# scanning
(Instant Access Point)(ARM)# spectrum-load-balancing
(Instant Access Point)(ARM)# spectrum-load-balancing calc-interval <Seconds>
(Instant Access Point)(ARM)# spectrum-load-balancing nb-matching <Percentage>
(Instant Access Point)(ARM)# spectrum-load-balancing calc-threshold <threshold>
(Instant Access Point)(ARM)# end (Instant Access Point)# commit apply
To view ARM configuration:
(Instant Access Point)# show arm config
Minimum Transmit Power :18
Air Time Fairness Mode :fair-access Spectrum Load Balancing :disable SLB NB Matching Percent :75 SLB Calculating Interval :30
165 enable