Aruba Instant ON APs supports Adaptive Radio Management(ARM) which takes care of the Wireless Network Performance.
What is ARM?
Adaptive Radio Management (ARM) is a Radio Frequency Management Technology that optimizes WLAN performance even in the networks with highest traffic
How does ARM work?
By default below features are supported by ARM on Aruba Instant ON AP.
Band Steering is one of the features of ARM. As there are more resources available on 5Ghz, Band steering has been designed to encourage dual-band capable clients connect to 5Ghz than 2.4Ghz on dual-band APs. By moving dual-band capable clients to 5Ghz, more resources can be availed on the 2.4GHz band for single-band clients.
The band steering feature considers several metrics before it determines if a client should be steered to the 5GHz band, including client RSSI. For example, this feature will only steer a client to the 5GHz band if that client detects an acceptable RSSI value from an 5GHz AP radio, and the signal from the 5Ghz radio is not significantly weaker than the RSSI from the 2.4GHz radio.
This feature also takes into account the current load on each radio of a AP. The band steering feature will NOT steer more clients to 5GHz on that AP if there are many clients associated to the AP, and significantly more 802.11a clients than 80211g clients.
The band steering feature will not proactively disconnect clients that are already associated with a radio. All band steering occurs when a client is trying to associate to a new AP radio.
By default, Prefer-5GHz is enabled on Instant ON AP.
In prefer-5GHz band steering mode, the AP will not respond to 2.4 Ghz probe requests from a client if all the following conditions are met.
Airtime Fairness is needed to provide every client with an equal opportunity to utilize the network bandwidth irrespective of client type, capability or operating system.
By default, ARM on Aruba Instant ON AP has the air time fairness mode set to default-access which ensures the fair distribution of available Wi-Fi bandwidth to all clients.
Wide Channel Bands
40 MHz channels can be used by configuring Wide Channels in the 2.4 GHz and 5.0 GHz bands. 40 MHz channels are two 20 MHz adjacent channels that are bonded together. They effectively doubles the frequency bandwidth available for data transmission. For high performance, 5.0 GHz band can be configured for Wide band. If the AP density is low, 2.4GHz band can be configured.
By default, ARM on Aruba Instant ON AP has the Wide Band set to 5GHz.