Brocade Mobility 7131N-FGR Access Point Product Reference Guide (Supporting software release 4.0.0.0-35GRN and later) - Manual (Page 15)

Brocade Mobility 7131N-FGR Product Reference Guide 3
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New features
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Per radio MU limit
Prior to this new 4.0 AP firmware baseline, an access point allowed a total of 127 MU associations,
regardless of the number of radios on the AP. With a dual-radio AP, if there were already 127 MUs
associated to one radio, that were no slots available for a MU to associate with another radio.
With the new 4.0 firmware, an AP can reserve slots on each radio so MUs of one radio type (11a/n
or 11bg/n) have better chances for AP association. Therefore, the total number of MUs allowed to
associate remains at 127, but you can now strategically distribute the 127 MU associations
between the data radios.
For information on setting the number of MU associations on a specific radio, see “Configuring the
802.11a/n or 802.11b/g/n radio” on page 142.
Power setting configuration
The access point’s power management functionality automatically configures the AP's operational
mode so it safely operates within available power. The power setting feature enables the user to
select one of three power operating modes, 3af, 3at and full power. When an access point is
operating in either 3af or 3at mode, the transmit power is always lower than the full power setting.
With the introduction of the Brocade Mobility 7131N-FGR Access Point, the power options available
for dual radio model access points has never been more diverse, and careful consideration must
be made before deploying the access point.
The AP’s hardware design uses a complex programmable logic device (CPLD). When an AP is
powered on (or performing a cold reset), the CPLD determines the maximum power available to the
AP by a POE device. Once an operational power configuration is defined, the AP firmware can read
the power setting and configure operating characteristics based on the AP’s SKU and power
configuration. If the POE cannot provide sufficient power (with all interfaces enabled), the following
interfaces could be disabled or modified:
• Radio transmit power could be reduced due to lack of sufficient power or the radio can be
disabled
• The WAN port configuration could be changed (enabled or disabled)
For information on configuring the access point’s power configuration, see “Configuring power
settings” on page 59.
AMSDU transmission support
Aggregate MAC Service Data Unit (AMSDU) is an 802.11n specific MAC feature which enhances
the transmission of multiple MSDU contents wrapped within a single preamble/packet
infrastructure. The AMSDU transmission limit is set to 3839 bites by default.
For information on configuring AMSDU support for an access point radio, see “Configuring the
802.11a/n or 802.11b/g/n radio” on page 142. AMSDU support can be defined by selecting the
Set Aggregation button within the Network Configuration -> Wireless -> Radio Configuration ->
Radio1
screen.