Alcatel-Lucent IAP93 Betriebsanweisung PDF herunterladen (Seite 212)

212 | Adaptive Radio Management AOS-W Instant 6.3.1.1-4.0 | User Guide

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

bandsteering, station handoff assist or load balancing features. 802.11ac-capable access points do not support the

legacy bandsteering, station hand off or load balancing settings, so these access points must be managed using

client match.

When the client match feature is enabled on an OAW-IAP, the OAW-IAP measures the RF health of its associated

clients. If one of the three mismatch conditions described below are met, clients are moved from one AP to another

for better performance and client experience. In the current release, the client match feature is supported only within

an OAW-IAP cluster.

The following client or OAW-IAP mismatch conditions are managed by the client match feature:

l Dynamic Load Balancing: Client match balances clients across OAW-IAPs on different channels, based upon

the client load on the OAW-IAPs and the SNR levels the client detects from an underutilized OAW-IAP. If an

OAW-IAP radio can support additional clients, the OAW-IAP will participate in client match load balancing and

clients can be directed to that OAW-IAP radio, subject to predefined SNR thresholds.

l Sticky Clients: The client match feature also helps mobile clients that tend to stay associated to an OAW-IAP

despite low signal levels. OAW-IAPs using client match continually monitor the client's RSSI as it roams

between OAW-IAPs, and move the client to an OAW-IAP when a better radio match can be found. This prevents

mobile clients from remaining associated to an APs with less than ideal RSSI, which can cause poor connectivity

and reduce performance for other clients associated with that OAW-IAP.

l Band Steering: OAW-IAPs using the client match feature monitor the RSSI for clients that advertise a dual-band

capability. If a client is currently associated to a 2.4 GHz radio and the AP detects that the client has a good

RSSI from the 5 GHz radio, the controller will attempt to steer the client to the 5 GHz radio, as long as the 5 GHz

RSSI is not significantly worse than the 2.4 GHz RSSI, and the OAW-IAP retains a suitable distribution of clients

on each of its radios.

By default, the client match feature is disabled. For information on client match configuration on an OAW-IAP, see

Configuring ARM Features on an OAW-IAP on page 213.

In the Instant 6.3.1.1-4.0 release, spectrum load balancing is integrated with the client match feature. Client match

allows the APs in a cluster to be divided into several logical AP RF neighborhood called domains, which share the

same clients. The Virtual Controller determines the distribution of clients and balances client load across channels,

regardless of whether the AP is responding to the wireless clients' probe requests.

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.

Access Point Control

The following access point control features are supported:

l Customize Valid Channels — You can customize Valid 5 GHz channels and Valid 2.4 GHz channels for

20MHz and 40MHz channels in the OAW-IAP. The administrators can configure the ARM channels in the

channel width window. The valid channels automatically show in the static channel assignment window.

l Minimum Transmit Power — This indicates the minimum Effective Isotropic Radiated Power (EIRP) from 3 to 33

dBm in 3 dBm increments. You may also specify a special value of 127 dBm for regulatory maximum to disable

power adjustments for environments such as outdoor mesh links. A higher power level setting may be

constrained by the local regulatory requirements and AP capabilities. If the minimum transmission EIRP setting

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Alcatel-Lucent IAP93 Betriebsanweisung Seite 212