Concept Guide

Airtime Fairness Mode
The airtime fairness feature provides equal access to all clients on the wireless medium, regardless of client
type, capability, or operating system, thus delivering uniform performance to all clients. This feature prevents
the clients from monopolizing resources. You can configure airtime fairness mode parameters through the
Instant UI or CLI.
In the Instant UI
1. For Airtime fairness mode configuration, specify any of the following values under the RF>ARM >Show
advanced options tab:
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 49: Airtime Fairness Mode - Configuration Parameters
2. Click OK.
In the CLI
(Instant AP)(config)# arm
(Instant AP)(ARM)# air-time-fairness-mode {<Default Access>| <Fair Access> | <Preferred
Access>
(Instant AP)(ARM)# end
(Instant AP)# commit apply
Client Match
The ARM client match feature continually monitors a client's RF neighborhood to provide ongoing client band
steering and load balancing, and enhanced AP reassignment for roaming mobile clients. This feature
supersedes the legacy band steering and spectrum load balancing features, which unlike client match, do not
trigger W-IAP changes for clients already associated to a W-IAP. In addition to this, the Client Match feature
provides the Smartphone Handoff Assist function which helps smartphones to switch between 3G and 4G
networks when the Wi-Fi connectivity is poor. The W-IAP monitors the Received Signal Strength Indicator (RSSI)
of the smartphone and checks if it remains under the threshold connectivity strength for a certain time and
deauthenticates the client.
Legacy 802.11a/b/g access points do not support the client match feature. When client match is enabled on
802.11n capable access points, the client match feature overrides any settings configured for the legacy
band steering, station hand off assist or load balancing features. 802.11ac-capable access points do not
support the legacy band steering, station hand off or load balancing settings, so these access points must be
managed using client match.
Dell Networking W-Series Instant 6.4.3.1-4.2.0.0 | User Guide Adaptive Radio Management | 252