Ap and mu load balancing, Wireless roaming – Brocade Mobility RFS7000-GR Controller System Reference Guide (Supporting software release 4.1.0.0-040GR and later) User Manual

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Brocade Mobility RFS7000-GR Controller System Reference Guide

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Software overview

1

The maximum number of WLANs per switch

The maximum number of Access Ports adopted per switch

The maximum number of MUs per switch

The maximum number of MUs per Access Port.

The actual number of Access Ports adoptable by a switch is defined by the switch licenses or the
total licenses in the cluster in which this switch is a member.

AP and MU load balancing

Fine tune a network to evenly distribute data and/or processing across available resources. Refer
to the following:

MU balancing across multiple APs

AP balancing across multiple switches

MU balancing across multiple APs
Per the 802.11 standard, AP and MU association is a process conducted independently of the
switch. 802.11 provides message elements used by the MU firmware to influence roaming
decisions. The switch implements the following MU load balancing techniques:

802.11e admission control — 1 byte: channel utilization % and 1 byte: MU count is sent in
QBSS Load Element in beacons to MU.

Load balancing element — 2 byte: MU Count are sent in beacon to MU.

AP balancing across multiple switches
At adoption, the AP solicits and receives multiple adoption responses from the switches on the
network. These adoption responses contain preference and loading information the AP uses to
select the optimum switch to be adopted by. Use this mechanism to define which APs are adopted
by which switches. By default, the adoption algorithm generally distributes AP adoption evenly
among the switches available.

NOTE

Port adoption per switch is determined by the number of licenses acquired.

For more information on Access Port adoption in a layer 3 environment, see

“Configuring Layer 3

access port adoption”

on page 206.

Wireless roaming

The following types of wireless roaming are supported by the switch:

Interswitch Layer 2 roaming

Interswitch Layer 3 roaming

Fast roaming

International roaming

MU move command

Power save polling

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